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HBASE-5097 RegionObserver implementation whose preScannerOpen and postScannerOpen Impl return null can stall the system initialization through NPE (Ram) 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1307036 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
ramkrishna 2012-03-29 18:34:02 +00:00
parent 2e959382ef
commit 26de676dea
1 changed files with 8 additions and 1 deletions
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9
src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
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@ -2326,7 +2326,14 @@ public class HRegionServer implements HRegionInterface, HBaseRPCErrorHandler,
s = r.getScanner(scan);
}
if (r.getCoprocessorHost() != null) {
s = r.getCoprocessorHost().postScannerOpen(scan, s);
RegionScanner savedScanner = r.getCoprocessorHost().postScannerOpen(
scan, s);
if (savedScanner == null) {
LOG.warn("PostScannerOpen impl returning null. "
+ "Check the RegionObserver implementation.");
} else {
s = savedScanner;
}
}
return addScanner(s);
} catch (Throwable t) {