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https://issues.apache.org/jira/browse/BOOKKEEPER-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13406453#comment-13406453
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Uma Maheswara Rao G commented on BOOKKEEPER-324:
------------------------------------------------
{quote}
Yup, the fix is quite straight forward. I wanted to check what was causing it
though, because by the time close is called, there should be nothing accessing
the ledger cache. I tracked it down to:
{quote}
Ok. Thanks Ivan.
Looks good +1 from me as well.
> Flakeyness in LedgerCreateDeleteTest
> ------------------------------------
>
> Key: BOOKKEEPER-324
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-324
> Project: Bookkeeper
> Issue Type: Bug
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Fix For: 4.2.0, 4.1.1
>
> Attachments: BOOKKEEPER-324.diff,
> TEST-org.apache.bookkeeper.test.LedgerCreateDeleteTest.xml
>
>
> Fails when running in a loop for about 40 minutes. Failure is a
> ConcurrentModificationException
> {code}
> <testcase time="3.018"
> classname="org.apache.bookkeeper.test.LedgerCreateDeleteTest"
> name="testCreateDeleteLedgers">
> <error
> type="java.util.ConcurrentModificationException">java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> at java.util.HashMap$EntryIterator.next(HashMap.java:834)
> at java.util.HashMap$EntryIterator.next(HashMap.java:832)
> at
> org.apache.bookkeeper.bookie.LedgerCacheImpl.close(LedgerCacheImpl.java:781)
> at
> org.apache.bookkeeper.bookie.InterleavedLedgerStorage.shutdown(InterleavedLedgerStorage.java:73)
> at org.apache.bookkeeper.bookie.Bookie.shutdown(Bookie.java:644)
> at org.apache.bookkeeper.bookie.Bookie.shutdown(Bookie.java:630)
> at
> org.apache.bookkeeper.proto.BookieServer.shutdown(BookieServer.java:110)
> at
> org.apache.bookkeeper.test.BookKeeperClusterTestCase.stopBKCluster(BookKeeperClusterTestCase.java:146)
> at
> org.apache.bookkeeper.test.BookKeeperClusterTestCase.tearDown(BookKeeperClusterTestCase.java:94)
> at junit.framework.TestCase.runBare(TestCase.java:140)
> at junit.framework.TestResult$1.protect(TestResult.java:110)
> {code}
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