Help with HBaseTestingUtility / MiniDFSCluster

Discussion:

David Williams

2013-07-13 02:37:10 UTC

Hi all,

I am having an issue starting the a mini cluster for the HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But the error is cryptic and I don't know what to do next.

I submitted a ticket with full details on StackOverflow,

http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments

But when I call .startMiniCluster on an instance of HBaseTestingUtility , on Linux (CentOS x86_64), I receive this error:

ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes (MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster (HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:555)

I would appreciate help in finding out whats going on and how to set up my ENV to use the HBaseTestingUtility.

Thanks
David

Ted Yu

2013-07-13 03:33:39 UTC

Permalink

What HBase version are you using for your Closure test ?

Thanks

Post by David Williams
Hi all,
I am having an issue starting the a mini cluster for the HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes (MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster (HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set up my ENV to use the HBaseTestingUtility.
Thanks
David

Ted Yu

2013-07-13 04:30:11 UTC

Permalink

I installed lein on Mac and Linux.

I tried 'lein test' on both platforms and the test passed on both:

lein test hbase.table-test
Starting DataNode 0 with dfs.data.dir:
/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data1,/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data2
Cluster is active

Ran 11 tests containing 14 assertions.
0 failures, 0 errors.

Here is Linux OS:

Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul 13
11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux

Looking at MiniDFSCluster.java, line 426:

String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();

It seems dn.getSelfAddr().getAddress() returned null.

According to:
http://docs.oracle.com/javase/7/docs/api/java/net/InetSocketAddress.html#getAddress()

This would mean address resolution problem.

Can you check ?

Cheers

On Fri, Jul 12, 2013 at 7:37 PM, David Williams

Post by David Williams
Hi all,
I am having an issue starting the a mini cluster for the
HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But
the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
But when I call .startMiniCluster on an instance of HBaseTestingUtility ,
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set up my
ENV to use the HBaseTestingUtility.
Thanks
David

David Williams

2013-07-13 05:22:21 UTC

Permalink

Hi Ted,

In terms of versions, here are the jars I'm using, which come from Maven Central.

org.apache.hadoop/hadoop-core "1.2.0"
org.apache.hbase/hbase "0.94.6.1"
org.apache.hadoop/hadoop-test "1.2.0"
org.apache.hbase/hbase "0.94.6.1" :classifier "tests"

The flag ':classifier "tests"' above is a specific instruction to to the Leiningen 2.0 to use the pomegranate library to handle Sonatype Aether and dynamic runtime modification of the classpath, which in this case is needed to import org.apache.hadoop.hbase HBaseTestingUtility.

https://github.com/cemerick/pomegranate

I just checked on address resolution, on my Mac OSX where the TestingUtility passes:

user=> (import 'java.net.InetSocketAddress)
java.net.InetSocketAddress
user=> (def x (InetSocketAddress. 8000))
#'user/x
user=> (.getAddress x)
#<Inet4Address 0.0.0.0/0.0.0.0>
user=>

Then I check on a CentOS vm, the unit tests still fail but the address resolution also worked in the repl and produced the same output as above.

Post by Ted Yu
I installed lein on Mac and Linux.
lein test hbase.table-test
Starting DataNode 0 with dfs.data.dir: /homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data1,/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data2
Cluster is active
Ran 11 tests containing 14 assertions.
0 failures, 0 errors.
Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul 13 11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
It seems dn.getSelfAddr().getAddress() returned null.
http://docs.oracle.com/javase/7/docs/api/java/net/InetSocketAddress.html#getAddress()
This would mean address resolution problem.
Can you check ?
Cheers
Hi all,
I am having an issue starting the a mini cluster for the HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes (MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster (HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set up my ENV to use the HBaseTestingUtility.
Thanks
David

Ted Yu

2013-07-13 20:11:00 UTC

Permalink

Post by David Williams
Hi Ted,
In terms of versions, here are the jars I'm using, which come from Maven Central.
org.apache.hadoop/hadoop-core "1.2.0"
org.apache.hbase/hbase "0.94.6.1"
org.apache.hadoop/hadoop-test "1.2.0"
org.apache.hbase/hbase "0.94.6.1" :classifier "tests"
The flag ':classifier "tests"' above is a specific instruction to to the
Leiningen 2.0 to use the pomegranate library to handle Sonatype Aether and
dynamic runtime modification of the classpath, which in this case is needed
to import org.apache.hadoop.hbase HBaseTestingUtility.
https://github.com/cemerick/pomegranate
I just checked on address resolution, on my Mac OSX where the
user=> (import 'java.net.InetSocketAddress)
java.net.InetSocketAddress
user=> (def x (InetSocketAddress. 8000))
#'user/x
user=> (.getAddress x)
#<Inet4Address 0.0.0.0/0.0.0.0>
user=>
Then I check on a CentOS vm, the unit tests still fail but the address
resolution also worked in the repl and produced the same output as above.
I installed lein on Mac and Linux.
lein test hbase.table-test
/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data1,/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data2
Cluster is active
Ran 11 tests containing 14 assertions.
0 failures, 0 errors.
Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul 13
11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
It seems dn.getSelfAddr().getAddress() returned null.
http://docs.oracle.com/javase/7/docs/api/java/net/InetSocketAddress.html#getAddress()
This would mean address resolution problem.
Can you check ?
Cheers

Post by David Williams
Hi all,
I am having an issue starting the a mini cluster for the
HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But
the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
But when I call .startMiniCluster on an instance of HBaseTestingUtility
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set up
my ENV to use the HBaseTestingUtility.
Thanks
David

David Williams

2013-07-13 23:08:05 UTC

Permalink

Hi Ted,

I updated the dependencies and ran the tests again, and on my Mac OSX they pass and on CentOS I get the same error:

$ lein test
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.pom from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.jar from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9-tests.jar from central

lein test hbase.config-test

lein test hbase.table-test
Starting DataNode 0 with dfs.data.dir: /home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data1,/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data2

lein test :only hbase.table-test/create-table

ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes (MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster (HBaseTestingUtility.java:451)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:619)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:575)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:562)
hbase.table_test$test_config.doInvoke (table_test.clj:10)
clojure.lang.RestFn.invoke (RestFn.java:397)
hbase.table_test/fn (table_test.clj:19)

Do you mind trying the following change to see if the problem persists for latest 0.94 release ?
Thanks
diff --git a/project.clj b/project.clj
index 2554784..0d8be0e 100644
--- a/project.clj
+++ b/project.clj
@@ -5,8 +5,8 @@
:dependencies [
[org.clojure/clojure "1.5.1"]
[org.apache.hadoop/hadoop-core "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1"]
+ [org.apache.hbase/hbase "0.94.9"]
[org.apache.hadoop/hadoop-test "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1" :classifier "tests"]]
+ [org.apache.hbase/hbase "0.94.9" :classifier "tests"]]
:plugins [[lein-marginalia "0.7.1"]])
Hi Ted,
In terms of versions, here are the jars I'm using, which come from Maven Central.
org.apache.hadoop/hadoop-core "1.2.0"
org.apache.hbase/hbase "0.94.6.1"
org.apache.hadoop/hadoop-test "1.2.0"
org.apache.hbase/hbase "0.94.6.1" :classifier "tests"
The flag ':classifier "tests"' above is a specific instruction to to the Leiningen 2.0 to use the pomegranate library to handle Sonatype Aether and dynamic runtime modification of the classpath, which in this case is needed to import org.apache.hadoop.hbase HBaseTestingUtility.
https://github.com/cemerick/pomegranate
user=> (import 'java.net.InetSocketAddress)
java.net.InetSocketAddress
user=> (def x (InetSocketAddress. 8000))
#'user/x
user=> (.getAddress x)
#<Inet4Address 0.0.0.0/0.0.0.0>
user=>
Then I check on a CentOS vm, the unit tests still fail but the address resolution also worked in the repl and produced the same output as above.

Ted Yu

2013-07-14 04:41:10 UTC

Permalink

Most likely this is an hdfs issue.

On Sat, Jul 13, 2013 at 4:08 PM, David Williams

Post by David Williams
Hi Ted,
I updated the dependencies and ran the tests again, and on my Mac OSX they
$ lein test
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.pom from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.jar from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9-tests.jar from central
lein test hbase.config-test
lein test hbase.table-test
/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data1,/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data2
lein test :only hbase.table-test/create-table
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:451)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:619)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:575)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:562)
hbase.table_test$test_config.doInvoke (table_test.clj:10)
clojure.lang.RestFn.invoke (RestFn.java:397)
hbase.table_test/fn (table_test.clj:19)
Do you mind trying the following change to see if the problem persists for
latest 0.94 release ?
Thanks
diff --git a/project.clj b/project.clj
index 2554784..0d8be0e 100644
--- a/project.clj
+++ b/project.clj
@@ -5,8 +5,8 @@
:dependencies [
[org.clojure/clojure "1.5.1"]
[org.apache.hadoop/hadoop-core "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1"]
+ [org.apache.hbase/hbase "0.94.9"]
[org.apache.hadoop/hadoop-test "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1" :classifier "tests"]]
+ [org.apache.hbase/hbase "0.94.9" :classifier "tests"]]
:plugins [[lein-marginalia "0.7.1"]])
On Fri, Jul 12, 2013 at 10:22 PM, David Williams <

Post by David Williams
Hi all,
I am having an issue starting the a mini cluster for the
HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But
the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
But when I call .startMiniCluster on an instance of HBaseTestingUtility
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init>
(MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set up
my ENV to use the HBaseTestingUtility.
Thanks
David

David Williams

2013-07-14 16:58:34 UTC

Permalink

Hi Ted,

I'd be interested to know more about an hdfs issue. I was go to look further into the line of reasoning you mentioned about the call to getAddress.

MiniDFSCluster.java, line 426:
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();

So that one of getSelfAddr or getAddress returned NULL. Is there something new about hdfs or are the two related?

Post by Ted Yu
Most likely this is an hdfs issue.
Hi Ted,
$ lein test
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.pom from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.jar from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9-tests.jar from central
lein test hbase.config-test
lein test hbase.table-test
Starting DataNode 0 with dfs.data.dir: /home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data1,/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data2
lein test :only hbase.table-test/create-table
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes (MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster (HBaseTestingUtility.java:451)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:619)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:575)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:562)
hbase.table_test$test_config.doInvoke (table_test.clj:10)
clojure.lang.RestFn.invoke (RestFn.java:397)
hbase.table_test/fn (table_test.clj:19)

Ted Yu

2013-07-14 17:47:33 UTC

Permalink

Here is one way of figuring out whether hdfs experiences the same issue is
the following:

check out http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1
use the command to find out which tests create MiniDFSCluster: find . -name
'*.java' -exec grep 'new MiniDFSCluster(' {} \; -print
run one of the tests: ant test-core -Dtestcase=TestCopyCommitter

See if there is similar exception.

On my Mac, I got:

[junit] Running org.apache.hadoop.tools.distcp2.mapred.TestCopyCommitter
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 12.283 sec

On Sun, Jul 14, 2013 at 9:58 AM, David Williams

Post by David Williams
Hi Ted,
I'd be interested to know more about an hdfs issue. I was go to look
further into the line of reasoning you mentioned about the call
to getAddress.
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
So that one of getSelfAddr or getAddress returned NULL. Is there
something new about hdfs or are the two related?
Most likely this is an hdfs issue.

Post by David Williams
Hi Ted,
I updated the dependencies and ran the tests again, and on my Mac OSX
$ lein test
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.pom from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.jar from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9-tests.jar from central
lein test hbase.config-test
lein test hbase.table-test
/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data1,/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data2
lein test :only hbase.table-test/create-table
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:451)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:619)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:575)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:562)
hbase.table_test$test_config.doInvoke (table_test.clj:10)
clojure.lang.RestFn.invoke (RestFn.java:397)
hbase.table_test/fn (table_test.clj:19)
Do you mind trying the following change to see if the problem persists
for latest 0.94 release ?
Thanks
diff --git a/project.clj b/project.clj
index 2554784..0d8be0e 100644
--- a/project.clj
+++ b/project.clj
@@ -5,8 +5,8 @@
:dependencies [
[org.clojure/clojure "1.5.1"]
[org.apache.hadoop/hadoop-core "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1"]
+ [org.apache.hbase/hbase "0.94.9"]
[org.apache.hadoop/hadoop-test "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1" :classifier "tests"]]
+ [org.apache.hbase/hbase "0.94.9" :classifier "tests"]]
:plugins [[lein-marginalia "0.7.1"]])
On Fri, Jul 12, 2013 at 10:22 PM, David Williams <

Post by David Williams
Hi Ted,
In terms of versions, here are the jars I'm using, which come from Maven Central.
org.apache.hadoop/hadoop-core "1.2.0"
org.apache.hbase/hbase "0.94.6.1"
org.apache.hadoop/hadoop-test "1.2.0"
org.apache.hbase/hbase "0.94.6.1" :classifier "tests"
The flag ':classifier "tests"' above is a specific instruction to to the
Leiningen 2.0 to use the pomegranate library to handle Sonatype Aether and
dynamic runtime modification of the classpath, which in this case is needed
to import org.apache.hadoop.hbase HBaseTestingUtility.
https://github.com/cemerick/pomegranate
user=> (import 'java.net.InetSocketAddress)
java.net.InetSocketAddress
user=> (def x (InetSocketAddress. 8000))
#'user/x
user=> (.getAddress x)
#<Inet4Address 0.0.0.0/0.0.0.0>
user=>
Then I check on a CentOS vm, the unit tests still fail but the address
resolution also worked in the repl and produced the same output as above.
I installed lein on Mac and Linux.
lein test hbase.table-test
/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data1,/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data2
Cluster is active
Ran 11 tests containing 14 assertions.
0 failures, 0 errors.
Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul 13
11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
It seems dn.getSelfAddr().getAddress() returned null.
http://docs.oracle.com/javase/7/docs/api/java/net/InetSocketAddress.html#getAddress()
This would mean address resolution problem.
Can you check ?
Cheers
On Fri, Jul 12, 2013 at 7:37 PM, David Williams <

Post by David Williams
Hi all,
I am having an issue starting the a mini cluster for the
HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But
the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
But when I call .startMiniCluster on an instance of
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init>
(MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set up
my ENV to use the HBaseTestingUtility.
Thanks
David

David Williams

2013-07-15 15:01:50 UTC

Permalink

Hi Ted,

So, what would you recommend in terms of getting a working HbaseTestingUtility or just unit testing in general? It's pretty much a prerequisite for me to be able to introduce HBase into production. We have a strict continuous integration process and I need to be able to build software for use with our Hbase cluster in our CI environment including running all tests. Our CI environment does not have its own test cluster and the chances of that becoming the case are slim. Besides the relative convenience of the testing utility is great.

Post by Ted Yu
check out http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1

I don't know anything about the hadoop source, this branch, or what is needed to run their JUnit tests. This is pretty much a non starter for me.

Post by Ted Yu
[junit] Running org.apache.hadoop.tools.distcp2.mapred.TestCopyCommitter
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 12.283 sec

Recall that this is not an issue on Mac OSX for some odd reason, only on CentOS and Linux VM's such as in use by travis-ci. You can see the failed build output here:

https://travis-ci.org/mobiusinversion/hbase

Recall also that I opened a travis-ci ticket and the travis support was able to reproduce success on Mac OSX and failure on Linux.

https://github.com/travis-ci/travis-ci/issues/1240

I started a bounty on SO:

http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments

St.Ack - what do you think the relative priority of this issue might be?

Post by Ted Yu
check out http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1
use the command to find out which tests create MiniDFSCluster: find . -name '*.java' -exec grep 'new MiniDFSCluster(' {} \; -print
run one of the tests: ant test-core -Dtestcase=TestCopyCommitter
See if there is similar exception.
[junit] Running org.apache.hadoop.tools.distcp2.mapred.TestCopyCommitter
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 12.283 sec
Hi Ted,
I'd be interested to know more about an hdfs issue. I was go to look further into the line of reasoning you mentioned about the call to getAddress.
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
So that one of getSelfAddr or getAddress returned NULL. Is there something new about hdfs or are the two related?

Ted Yu

2013-07-15 16:49:03 UTC

Permalink

I would be busy today so expect delay in future response.

bq. Recall that this is not an issue on Mac OSX for some odd reason

I didn't reproduce the issue you mentioned on either OSX or Linux.

Maybe people who use CentOS for ci can comment on this matter.

Cheers

On Mon, Jul 15, 2013 at 8:01 AM, David Williams

Post by David Williams
Hi Ted,
So, what would you recommend in terms of getting a working
HbaseTestingUtility or just unit testing in general? It's pretty much a
prerequisite for me to be able to introduce HBase into production. We have
a strict continuous integration process and I need to be able to build
software for use with our Hbase cluster in our CI environment including
running all tests. Our CI environment does not have its own test cluster
and the chances of that becoming the case are slim. Besides the relative
convenience of the testing utility is great.

Post by Ted Yu
check out

http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1
I don't know anything about the hadoop source, this branch, or what is
needed to run their JUnit tests. This is pretty much a non starter for me.

Post by Ted Yu
[junit] Running org.apache.hadoop.tools.distcp2.mapred.TestCopyCommitter
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 12.283 sec

Recall that this is not an issue on Mac OSX for some odd reason, only on
CentOS and Linux VM's such as in use by travis-ci. You can see the failed
https://travis-ci.org/mobiusinversion/hbase
Recall also that I opened a travis-ci ticket and the travis support was
able to reproduce success on Mac OSX and failure on Linux.
https://github.com/travis-ci/travis-ci/issues/1240
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
St.Ack - what do you think the relative priority of this issue might be?
check out http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1
use the command to find out which tests create MiniDFSCluster: find .
-name '*.java' -exec grep 'new MiniDFSCluster(' {} \; -print
run one of the tests: ant test-core -Dtestcase=TestCopyCommitter
See if there is similar exception.
[junit] Running
org.apache.hadoop.tools.distcp2.mapred.TestCopyCommitter
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 12.283 sec

Post by Ted Yu
Hi Ted,
I'd be interested to know more about an hdfs issue. I was go to look
further into the line of reasoning you mentioned about the call
to getAddress.
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
So that one of getSelfAddr or getAddress returned NULL. Is there
something new about hdfs or are the two related?
Most likely this is an hdfs issue.
On Sat, Jul 13, 2013 at 4:08 PM, David Williams <

Post by David Williams
Hi Ted,
I updated the dependencies and ran the tests again, and on my Mac OSX
$ lein test
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.pom from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9.jar from central
Retrieving org/apache/hbase/hbase/0.94.9/hbase-0.94.9-tests.jar from central
lein test hbase.config-test
lein test hbase.table-test
/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data1,/home/dwilliams/Desktop/Repos/hbase/target/test-data/1140edc6-7242-40cd-8ed8-05847fb14949/dfscluster_1e40ce89-1986-450b-ba6d-983caa9aeb78/dfs/data/data2
lein test :only hbase.table-test/create-table
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init>
(MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:451)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:619)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:575)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:562)
hbase.table_test$test_config.doInvoke (table_test.clj:10)
clojure.lang.RestFn.invoke (RestFn.java:397)
hbase.table_test/fn (table_test.clj:19)
Do you mind trying the following change to see if the problem persists
for latest 0.94 release ?
Thanks
diff --git a/project.clj b/project.clj
index 2554784..0d8be0e 100644
--- a/project.clj
+++ b/project.clj
@@ -5,8 +5,8 @@
:dependencies [
[org.clojure/clojure "1.5.1"]
[org.apache.hadoop/hadoop-core "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1"]
+ [org.apache.hbase/hbase "0.94.9"]
[org.apache.hadoop/hadoop-test "1.2.0"]
- [org.apache.hbase/hbase "0.94.6.1" :classifier "tests"]]
+ [org.apache.hbase/hbase "0.94.9" :classifier "tests"]]
:plugins [[lein-marginalia "0.7.1"]])
On Fri, Jul 12, 2013 at 10:22 PM, David Williams <

Post by David Williams
Hi Ted,
In terms of versions, here are the jars I'm using, which come from Maven Central.
org.apache.hadoop/hadoop-core "1.2.0"
org.apache.hbase/hbase "0.94.6.1"
org.apache.hadoop/hadoop-test "1.2.0"
org.apache.hbase/hbase "0.94.6.1" :classifier "tests"
The flag ':classifier "tests"' above is a specific instruction to to
the Leiningen 2.0 to use the pomegranate library to handle Sonatype Aether
and dynamic runtime modification of the classpath, which in this case is
needed to import org.apache.hadoop.hbase HBaseTestingUtility.
https://github.com/cemerick/pomegranate
user=> (import 'java.net.InetSocketAddress)
java.net.InetSocketAddress
user=> (def x (InetSocketAddress. 8000))
#'user/x
user=> (.getAddress x)
#<Inet4Address 0.0.0.0/0.0.0.0>
user=>
Then I check on a CentOS vm, the unit tests still fail but the address
resolution also worked in the repl and produced the same output as above.
I installed lein on Mac and Linux.
lein test hbase.table-test
/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data1,/homes/hortonzy/mobius/target/test-data/246828b9-1be9-4949-9bbc-b215b378fb67/dfscluster_9ed0bd88-d309-4fed-9823-3bbf86973ae4/dfs/data/data2
Cluster is active
Ran 11 tests containing 14 assertions.
0 failures, 0 errors.
Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul
13 11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux
String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
It seems dn.getSelfAddr().getAddress() returned null.
http://docs.oracle.com/javase/7/docs/api/java/net/InetSocketAddress.html#getAddress()
This would mean address resolution problem.
Can you check ?
Cheers
On Fri, Jul 12, 2013 at 7:37 PM, David Williams <

Post by David Williams
Hi all,
I am having an issue starting the a mini cluster for the
HBaseTestingUtility. In short I can on Mac OSX, but cannot on Linux. But
the error is cryptic and I don't know what to do next.
I submitted a ticket with full details on StackOverflow,
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
But when I call .startMiniCluster on an instance of
ERROR in (create-table) (MiniDFSCluster.java:426)
Uncaught exception, not in assertion.
expected: nil
actual: java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
(MiniDFSCluster.java:426)
org.apache.hadoop.hdfs.MiniDFSCluster.<init>
(MiniDFSCluster.java:284)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
(HBaseTestingUtility.java:444)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:612)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:568)
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
(HBaseTestingUtility.java:555)
I would appreciate help in finding out whats going on and how to set
up my ENV to use the HBaseTestingUtility.
Thanks
David

David Williams

2013-07-15 17:17:34 UTC

Permalink

I doubt this has anything todo specifically with CentOS etc. I am not privy to your setup up but the steps to reproduce are easy.

1. Get a linux distro such as CentOS. Put it say, in a VM such as Vmware Fusion on Mac.
2. Install Java
3. Try to start a mini cluster (will fail)

The bottom line is there is an uncaught null pointer exception in the Testing Utility. Is this considered to be of little priority?

Post by Ted Yu
Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul 13 11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux

Ted, what linux distribution is that?

Post by Ted Yu
I would be busy today so expect delay in future response.
bq. Recall that this is not an issue on Mac OSX for some odd reason
I didn't reproduce the issue you mentioned on either OSX or Linux.
Maybe people who use CentOS for ci can comment on this matter.
Cheers
Hi Ted,
So, what would you recommend in terms of getting a working HbaseTestingUtility or just unit testing in general? It's pretty much a prerequisite for me to be able to introduce HBase into production. We have a strict continuous integration process and I need to be able to build software for use with our Hbase cluster in our CI environment including running all tests. Our CI environment does not have its own test cluster and the chances of that becoming the case are slim. Besides the relative convenience of the testing utility is great.

Post by Ted Yu
check out http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1

I don't know anything about the hadoop source, this branch, or what is needed to run their JUnit tests. This is pretty much a non starter for me.

Post by Ted Yu
[junit] Running org.apache.hadoop.tools.distcp2.mapred.TestCopyCommitter
[junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 12.283 sec

https://travis-ci.org/mobiusinversion/hbase
Recall also that I opened a travis-ci ticket and the travis support was able to reproduce success on Mac OSX and failure on Linux.
https://github.com/travis-ci/travis-ci/issues/1240
http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
St.Ack - what do you think the relative priority of this issue might be?

Gary Helmling

2013-07-15 17:25:22 UTC

Permalink

Hi David,

I can't say for certain given the test output (would need to see the logs
generated by the datanodes), but there is a common issue running mini
cluster unit tests if the environment's umask is not set to 022. This is
due to https://issues.apache.org/jira/browse/HDFS-2556 where the mini
cluster DNs fail fast if the dfs.data.dir permissions do not match what is
expected.

We ran into this issue setting up builds or our hRaven project (which uses
HBaseTestingUtility) with Travis CI. Modifying our .travis.yml file by
adding the following line fixed the problem:

script: umask 0022 && mvn test

This should override the umask for the test process for your project.

--gh

On Mon, Jul 15, 2013 at 10:17 AM, David Williams

Post by David Williams
I doubt this has anything todo specifically with CentOS etc. I am not
privy to your setup up but the steps to reproduce are easy.
1. Get a linux distro such as CentOS. Put it say, in a VM such as Vmware Fusion on Mac.
2. Install Java
3. Try to start a mini cluster (will fail)
The bottom line is there is an uncaught null pointer exception in the
Testing Utility. Is this considered to be of little priority?

Post by Ted Yu
Linux a.net 2.6.32-220.23.1.el6.YAHOO.20120713.x86_64 #1 SMP Fri Jul 13

11:40:51 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux
Ted, what linux distribution is that?

HbaseTestingUtility or just unit testing in general? It's pretty much a
prerequisite for me to be able to introduce HBase into production. We have
a strict continuous integration process and I need to be able to build
software for use with our Hbase cluster in our CI environment including
running all tests. Our CI environment does not have its own test cluster
and the chances of that becoming the case are slim. Besides the relative
convenience of the testing utility is great.