[HADOOP-8790] testTrashEmptier() fails when run TestHDFSTrash

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.0.1-alpha
• Component/s: test
• Labels: BB2015-05-TBR
• Assignee: Unassigned
• Reporter: Han Xiao
• Created: 12/Sep/12 09:24
• Updated: 28/Sep/15 22:29

Description

In our test environment, TestHDFSTrash.testTrashEmptier fails occasionally:

Standout is:
2012-09-12 01:09:23,732 WARN conf.Configuration (Configuration.java:warnOnceIfDeprecated(737)) - fs.default.name is deprecated. Instead, use fs.defaultFS
Moved: 'file:/home/hadoop/jenkins/jenkins_home/jobs/hadoop-hdfs-test/workspace/hadoop-hdfs/target/test/data/testTrash/test/mkdirs/myFile0' to trash at: file:/home/hadoop/.Trash/Current

Stacktrace is:
junit.framework.AssertionFailedError: null
at junit.framework.Assert.fail(Assert.java:47)
at junit.framework.Assert.assertTrue(Assert.java:20)
at junit.framework.Assert.assertTrue(Assert.java:27)
at org.apache.hadoop.fs.TestTrash.testTrashEmptier(TestTrash.java:533)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:243)
at junit.framework.TestSuite.run(TestSuite.java:238)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:23)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.extensions.TestSetup.run(TestSetup.java:27)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:236)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:134)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:113)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:103)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:74)

So it seems that at the beginning, the condition that 'checkpoints.size() == 4' is true. Then the testcase fails right away.
If the Trash directory likes bellow, the testcase fails everytime.

hadoop@HADOOP-CI-AGENT-A:~/.Trash> l
total 24
drwxr-xr-x 6 hadoop users 4096 Sep 12 17:26 ./
drwx------ 21 hadoop users 4096 Sep 12 17:25 ../
drwxr-xr-x 3 hadoop users 4096 Sep 12 17:26 120912170042/
drwxr-xr-x 3 hadoop users 4096 Sep 12 17:00 120912170048/
drwxr-xr-x 3 hadoop users 4096 Sep 12 17:00 120912170054/
drwxr-xr-x 3 hadoop users 4096 Sep 12 17:00 Current/

So the testcase must be modified to avoid the failing in such a precondition.

Issue Links

• is related to: HADOOP-7663 TestHDFSTrash failing on 22
• relates to: HADOOP-7326 TestTrash.testTrashEmptier() infinite loops if run on a home directory with stuff in .Trash