Hi Vijay!
Thanks a lot for your initiative. You are correct. There are often a lot of
unit tests which fail in addition to flaky tests which fail intermittently.
About two years ago I tried to bring the number of unit test failures down to
zero, but since then a lot of features have been added and I'm guessing the
number of test failures has crept back up. Most people just keep a list of
tests which fail usually and ignore those. There also ought to be open JIRAs
for failing tests usually.
As a community we should try to bring these down to 0, but everyone is busy
putting in new features and improving our CI unfortunately falls in priority.
Prime areas for contributions ;-)
HTHRavi
On Monday, December 1, 2014 5:03 PM, "Bhat, Vijay (CONT)"
<[email protected]> wrote:
Hi all,
My name is Vijay Bhat and I am looking to contribute to the Hadoop YARN
project. I have been using and benefiting from Hadoop ecosystem technologies
for a few years now and I want to give back to the community that makes this
happen.
I forked the apache/hadoop branch on github and synced to the last commit
(https://github.com/apache/hadoop/commit/1556f86a31a54733d6550363aa0e027acca7823b)
that successfully built on the Apache build server
(https://builds.apache.org/view/All/job/Hadoop-Yarn-trunk/758/).
However, I get test case failures when I build the Hadoop source code on a VM
running Ubuntu 12.04 LTS.
The maven command I am running from the hadoop base directory is:
mvn clean install -U
Console output
Tests run: 9, Failures: 2, Errors: 0, Skipped: 0, Time elapsed: 2.392 sec <<<
FAILURE! - in org.apache.hadoop.ipc.TestDecayRpcScheduler
testAccumulate(org.apache.hadoop.ipc.TestDecayRpcScheduler) Time elapsed:
0.084 sec <<< FAILURE!
java.lang.AssertionError: expected:<3> but was:<2>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:743)
at org.junit.Assert.assertEquals(Assert.java:118)
at org.junit.Assert.assertEquals(Assert.java:555)
at org.junit.Assert.assertEquals(Assert.java:542)
at
org.apache.hadoop.ipc.TestDecayRpcScheduler.testAccumulate(TestDecayRpcScheduler.java:136)
testPriority(org.apache.hadoop.ipc.TestDecayRpcScheduler) Time elapsed: 0.052
sec <<< FAILURE!
java.lang.AssertionError: expected:<1> but was:<0>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:743)
at org.junit.Assert.assertEquals(Assert.java:118)
at org.junit.Assert.assertEquals(Assert.java:555)
at org.junit.Assert.assertEquals(Assert.java:542)
at
org.apache.hadoop.ipc.TestDecayRpcScheduler.testPriority(TestDecayRpcScheduler.java:197)
Tests run: 3, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 111.519 sec <<<
FAILURE! - in org.apache.hadoop.ha.TestZKFailoverControllerStress
testExpireBackAndForth(org.apache.hadoop.ha.TestZKFailoverControllerStress)
Time elapsed: 45.46 sec <<< ERROR!
java.lang.Exception: test timed out after 40000 milliseconds
at java.lang.Thread.sleep(Native Method)
at org.apache.hadoop.ha.MiniZKFCCluster.waitForHAState(MiniZKFCCluster.java:164)
at
org.apache.hadoop.ha.MiniZKFCCluster.expireAndVerifyFailover(MiniZKFCCluster.java:236)
at
org.apache.hadoop.ha.TestZKFailoverControllerStress.testExpireBackAndForth(TestZKFailoverControllerStress.java:79)
Tests run: 19, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 62.514 sec <<<
FAILURE! - in org.apache.hadoop.ha.TestZKFailoverController
testGracefulFailoverFailBecomingStandby(org.apache.hadoop.ha.TestZKFailoverController)
Time elapsed: 15.062 sec <<< ERROR!
java.lang.Exception: test timed out after 15000 milliseconds
at java.lang.Object.wait(Native Method)
at
org.apache.hadoop.ha.ZKFailoverController.waitForActiveAttempt(ZKFailoverController.java:467)
at
org.apache.hadoop.ha.ZKFailoverController.doGracefulFailover(ZKFailoverController.java:657)
at
org.apache.hadoop.ha.ZKFailoverController.access$400(ZKFailoverController.java:61)
at
org.apache.hadoop.ha.ZKFailoverController$3.run(ZKFailoverController.java:602)
at
org.apache.hadoop.ha.ZKFailoverController$3.run(ZKFailoverController.java:599)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1683)
at
org.apache.hadoop.ha.ZKFailoverController.gracefulFailoverToYou(ZKFailoverController.java:599)
at org.apache.hadoop.ha.ZKFCRpcServer.gracefulFailover(ZKFCRpcServer.java:94)
at
org.apache.hadoop.ha.TestZKFailoverController.testGracefulFailoverFailBecomingStandby(TestZKFailoverController.java:532)
When I skip the tests, the source code compiles successfully.
mvn clean install -U –DskipTests
Is there something I’m doing incorrectly that’s causing the test cases to fail?
I’d really appreciate any insight from folks who have gone through this process
before. I’ve looked at the JIRAs labeled newbie
(http://wiki.apache.org/hadoop/HowToContribute) but didn’t find promising leads.
Thanks for the help!
-Vijay
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