[infinispan-issues] [JBoss JIRA] (ISPN-5534) CreateCacheCommand doesn't properly wait for the cache to stabilize

[Dan Berindei (JIRA)]

Dan Berindei created ISPN-5534:
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             Summary: CreateCacheCommand doesn't properly wait for the cache to stabilize
                 Key: ISPN-5534
                 URL: https://issues.jboss.org/browse/ISPN-5534
             Project: Infinispan
          Issue Type: Bug
          Components: Core
    Affects Versions: 8.0.0.Alpha1, 7.2.2.Final
            Reporter: Dan Berindei
            Assignee: Dan Berindei
            Priority: Blocker
             Fix For: 8.0.0.Alpha2


Because of ISPN-5533, {{CreateCacheCommand.perform()}} waits for the cache to stabilize with a certain number of members. However, the wait condition is wrong: it will exit the loop when either the number of members is correct *or* there is no rebalance in progress.

{code}
while (stm.getCacheTopology().getMembers().size() != expectedSize || stm.getCacheTopology().getPendingCH() != null) {
{code}

Combined with ISPN-5533, this is causing random failures in the M/R tests, e.g.

{noformat}
23:17:45,353 ERROR (testng-DistributedFourNodesMapReduceTest:) [UnitTestTestNGListener] Test testInvokeMapReduceOnAllKeysWithResultCache(org.infinispan.distexec.mapreduce.DistributedFourNodesMapReduceTest) failed.
java.lang.AssertionError: key 'community' does not have count 2 but 4
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.infinispan.distexec.mapreduce.BaseWordCountMapReduceTest.verifyResults(BaseWordCountMapReduceTest.java:256)
	at org.infinispan.distexec.mapreduce.BaseWordCountMapReduceTest.verifyResults(BaseWordCountMapReduceTest.java:380)
	at org.infinispan.distexec.mapreduce.BaseWordCountMapReduceTest.testInvokeMapReduceOnAllKeysWithResultCache(BaseWordCountMapReduceTest.java:175)
{noformat}




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