[HDFS-7226] TestDNFencing.testQueueingWithAppend failed often in latest test

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.6.0
• Component/s: ha
• Hadoop Flags: Reviewed
• Assignee: Yongjun Zhang
• Reporter: Yongjun Zhang
• Created: 10/Oct/14 18:17
• Updated: 01/Dec/14 03:08
• Resolved: 22/Oct/14 17:51

Description

Using tool from HADOOP-11045, got the following report:

[yzhang@localhost jenkinsftf]$ ./determine-flaky-tests-hadoop.py -j PreCommit-HDFS-Build -n 1 

****Recently FAILED builds in url: https://builds.apache.org//job/PreCommit-HDFS-Build
    THERE ARE 9 builds (out of 9) that have failed tests in the past 1 days, as listed below:
......
Among 9 runs examined, all failed tests <#failedRuns: testName>:
    7: org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencing.testQueueingWithAppend
    6: org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencingWithReplication.testFencingStress
    3: org.apache.hadoop.hdfs.server.namenode.snapshot.TestOpenFilesWithSnapshot.testOpenFilesWithMultipleSnapshots
    1: org.apache.hadoop.hdfs.server.namenode.TestEditLog.testFailedOpen
    1: org.apache.hadoop.hdfs.server.namenode.TestEditLog.testSyncBatching
......

TestDNFencingWithReplication.testFencingStress was reported as HDFS-7221.

Creating this jira for TestDNFencing.testQueueingWithAppend.

Symptom:

Failed

org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencing.testQueueingWithAppend

Failing for the past 1 build (Since Failed#8390 )
Took 2.9 sec.
Error Message

expected:<18> but was:<12>
Stacktrace

java.lang.AssertionError: expected:<18> but was:<12>
	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.hdfs.server.namenode.ha.TestDNFencing.testQueueingWithAppend(TestDNFencing.java:448)

Issue Links

• is broken by: HDFS-7217 Better batching of IBRs
• is duplicated by: HADOOP-11189 TestDNFencing.testQueueingWithAppend failed often in latest test