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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/06/14 00:21:07 UTC
[jira] Commented: (HBASE-1503) hbase-1304 dropped updating list of
store files on flush
[ https://issues.apache.org/jira/browse/HBASE-1503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719187#action_12719187 ]
stack commented on HBASE-1503:
------------------------------
Saw this w/ v2:
{code}
Caused by: java.lang.NullPointerException
at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:89)
at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:62)
at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:211)
at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:583)
at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:569)
at org.apache.hadoop.hbase.regionserver.Store.flushCache(Store.java:479)
at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:925)
... 3 more
{code}
> hbase-1304 dropped updating list of store files on flush
> --------------------------------------------------------
>
> Key: HBASE-1503
> URL: https://issues.apache.org/jira/browse/HBASE-1503
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: Jonathan Gray
> Fix For: 0.20.0
>
> Attachments: HBASE-1503-v1.patch, HBASE-1503-v2.patch
>
>
> Here is how current updateReaders is implemented in StoreScanner:
> {code}
> // Implementation of ChangedReadersObserver
> public void updateReaders() throws IOException {
> if (this.closing.get()) {
> return;
> }
> this.lock.writeLock().lock();
> try {
> // Could do this pretty nicely with KeyValueHeap, but the existing
> // implementation of this method only updated if no existing storefiles?
> // Lets discuss.
> return;
> } finally {
> this.lock.writeLock().unlock();
> }
> }
> {code}
> Fill in missing functionality.
> Count of store files changes on flush and compaction.
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