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https://issues.apache.org/jira/browse/BOOKKEEPER-568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13577746#comment-13577746
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Hadoop QA commented on BOOKKEEPER-568:
--------------------------------------
Testing JIRA BOOKKEEPER-568
Patch
[0001-BOOKKEEPER-568-NPE-during-GC-with-HierarchicalLedger.patch|https://issues.apache.org/jira/secure/attachment/12569214/0001-BOOKKEEPER-568-NPE-during-GC-with-HierarchicalLedger.patch]
downloaded at Wed Feb 13 16:51:16 UTC 2013
----------------------------
{color:green}+1 PATCH_APPLIES{color}
{color:green}+1 CLEAN{color}
{color:green}+1 RAW_PATCH_ANALYSIS{color}
. {color:green}+1{color} the patch does not introduce any @author tags
. {color:green}+1{color} the patch does not introduce any tabs
. {color:green}+1{color} the patch does not introduce any trailing spaces
. {color:green}+1{color} the patch does not introduce any line longer than
120
. {color:green}+1{color} the patch does adds/modifies 1 testcase(s)
{color:green}+1 RAT{color}
. {color:green}+1{color} the patch does not seem to introduce new RAT
warnings
{color:green}+1 JAVADOC{color}
. {color:green}+1{color} the patch does not seem to introduce new Javadoc
warnings
{color:green}+1 COMPILE{color}
. {color:green}+1{color} HEAD compiles
. {color:green}+1{color} patch compiles
. {color:green}+1{color} the patch does not seem to introduce new javac
warnings
{color:green}+1 FINDBUGS{color}
. {color:green}+1{color} the patch does not seem to introduce new Findbugs
warnings
{color:green}+1 TESTS{color}
. Tests run: 817
{color:green}+1 DISTRO{color}
. {color:green}+1{color} distro tarball builds with the patch
----------------------------
{color:green}*+1 Overall result, good!, no -1s*{color}
The full output of the test-patch run is available at
. https://builds.apache.org/job/bookkeeper-trunk-precommit-build/268/
> NPE during GC with HierarchicalLedgerManager
> --------------------------------------------
>
> Key: BOOKKEEPER-568
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-568
> Project: Bookkeeper
> Issue Type: Bug
> Components: bookkeeper-server
> Affects Versions: 4.2.0
> Reporter: Matteo Merli
> Priority: Minor
> Attachments:
> 0001-BOOKKEEPER-568-NPE-during-GC-with-HierarchicalLedger.patch
>
>
> {noformat}
> 2013-02-11 14:06:28,904 - WARN -
> [GarbageCollectorThread:ScanAndCompareGarbageCollector@103] - Exception when
> iterating over the metadata {}
> java.io.IOException: Error when check more elements
> at
> org.apache.bookkeeper.meta.HierarchicalLedgerManager$HierarchicalLedgerRangeIterator.hasNext(HierarchicalLedgerManager.java:423)
> at
> org.apache.bookkeeper.bookie.ScanAndCompareGarbageCollector.gc(ScanAndCompareGarbageCollector.java:75)
> at
> org.apache.bookkeeper.bookie.GarbageCollectorThread.doGcLedgers(GarbageCollectorThread.java:302)
> at
> org.apache.bookkeeper.bookie.GarbageCollectorThread.run(GarbageCollectorThread.java:271)
> Caused by: java.lang.NullPointerException
> at
> org.apache.bookkeeper.meta.HierarchicalLedgerManager$HierarchicalLedgerRangeIterator.hasNext(HierarchicalLedgerManager.java:419)
> ... 3 more
> {noformat}
> In the code below, l2NodesIter appears to be null.
> {code}
> public boolean hasNext() throws IOException {
> try {
> if (l1NodesIter == null) {
> l1NodesIter = zk.getChildren(ledgerRootPath, null).iterator();
> hasMoreElement = nextL1Node();
> } else if (!l2NodesIter.hasNext()) {
> hasMoreElement = nextL1Node();
> }
> } catch (Exception e) {
> throw new IOException("Error when check more elements", e);
> }
> return hasMoreElement;
> }
> {code}
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