[jira] [Created] (HBASE-10542) ConcurrentModificationException in TestHTraceHooks

["Enis Soztutar (JIRA)" <ji...@apache.org>]

Enis Soztutar created HBASE-10542:
-------------------------------------

             Summary: ConcurrentModificationException in TestHTraceHooks
                 Key: HBASE-10542
                 URL: https://issues.apache.org/jira/browse/HBASE-10542
             Project: HBase
          Issue Type: Bug
            Reporter: Enis Soztutar
             Fix For: 0.99.0


I got this in one of my test runs: 
{code}
<error type="java.util.ConcurrentModificationException">java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894)
        at java.util.HashMap$KeyIterator.next(HashMap.java:928)
        at org.cloudera.htrace.TraceTree.&lt;init&gt;(TraceTree.java:48)
        at org.apache.hadoop.hbase.trace.TestHTraceHooks.testTraceCreateTable(TestHTraceHooks.java:118)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
{code}

It looks like TraceTree ctor, clones the spans collection, but iterates over the original argument, rather than cloned. 

I don't know enough of HTrace to fix it, so just reporting it here. [~eclark] FYI. 



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