Matteo Merli created BOOKKEEPER-568: ---------------------------------------
Summary: 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 {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} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira