[HBASE-7550] Synchronization problem in AssignmentManager - ASF JIRA

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Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 0.94.5
Component/s: None
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Reviewed

Description

While running TestSplitTransactionOnCluster#testShouldClearRITWhenNodeFoundInSplittingState in a loop I encountered this error condition:

java.util.NoSuchElementException
        at java.util.concurrent.ConcurrentSkipListMap$Iter.advance(ConcurrentSkipListMap.java:2224)
        at java.util.concurrent.ConcurrentSkipListMap$EntryIterator.next(ConcurrentSkipListMap.java:2270)
        at java.util.concurrent.ConcurrentSkipListMap$EntryIterator.next(ConcurrentSkipListMap.java:2266)
        at java.util.TreeMap.buildFromSorted(TreeMap.java:2394)
        at java.util.TreeMap.buildFromSorted(TreeMap.java:2344)
        at java.util.TreeMap.&lt;init&gt;(TreeMap.java:195)
        at org.apache.hadoop.hbase.master.AssignmentManager.getRegionsInTransition(AssignmentManager.java:2843)
        at org.apache.hadoop.hbase.regionserver.TestSplitTransactionOnCluster.testShouldClearRITWhenNodeFoundInSplittingState(TestSplitTransactionOnCluster.java:637)

This can only occur when the map being copied into the TreeMap is modified concurrently.
While looking at the (0.94) code I noticed that synchronization is indeed missing from the nodeDeleted hook.

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7550.txt
14/Jan/13 04:59
0.8 kB
Lars Hofhansl

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Assignee:: Lars Hofhansl

Reporter:: Lars Hofhansl

Votes:: 0 Vote for this issue

Watchers:: 6 Start watching this issue

Dates

Created:: 14/Jan/13 04:54

Updated:: 16/Feb/13 04:14

Resolved:: 14/Jan/13 05:32