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https://issues.apache.org/jira/browse/HBASE-8055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-8055:
---------------------------------
Attachment: 8055-0.94.txt
Here's a trivial 0.94 patch.
In the absence of any information we'll assume the timerange of this StoreFile
extends to the end of time.
(This is similar to other null checks we're doing for example in
Store.isMajorCompaction(...))
> Potentially missing null check in StoreFile.Reader.getMaxTimestamp()
> --------------------------------------------------------------------
>
> Key: HBASE-8055
> URL: https://issues.apache.org/jira/browse/HBASE-8055
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Fix For: 0.95.0, 0.98.0, 0.94.7
>
> Attachments: 8055-0.94.txt
>
>
> We just ran into a scenario where we got the following NPE:
> {code}
> 13/03/08 11:52:13 INFO regionserver.Store: Successfully loaded store file
> file:/tmp/hfile-import-00Dxx0000001lmJ-09Cxx00000000Jm/COLFAM/file09Cxx00000000Jm
> into store COLFAM (new location:
> file:/tmp/localhbase/data/SFDC.ENTITY_HISTORY_ARCHIVE/aeacee43aaf1748c6e60b9cc12bcac3d/COLFAM/120d683414e44478984b50ddd79b6826)
> 13/03/08 11:52:13 ERROR regionserver.HRegionServer: Failed openScanner
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.StoreFile$Reader.getMaxTimestamp(StoreFile.java:1702)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.requestSeek(StoreFileScanner.java:301)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:127)
> at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2070)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3383)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1628)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1620)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2342)
> at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1400)
> 13/03/08 11:52:14 ERROR regionserver.HRegionServer: Failed openScanner
> {code}
> It's not clear, yet, how we got into this situation (we are generating HFiles
> via HFileOutputFormat and bulk load those). It seems that can only happen
> when the HFile itself is corrupted.
> Looking at the code, though, I see this is the only place where we access
> StoreFile.reader.timeRangeTracker without a null check. So it appears we are
> expecting scenarios in which it can be null.
> A simple fix would be:
> {code}
> public long getMaxTimestamp() {
> return timeRangeTracker == null ? Long.MAX_VALUE :
> timeRangeTracker.maximumTimestamp;
> }
> {code}
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