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From "Ashu Pachauri (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17031) Scanners should check for null start and end rows
Date Sat, 05 Nov 2016 00:06:58 GMT
Ashu Pachauri created HBASE-17031:
-------------------------------------

             Summary: Scanners should check for null start and end rows
                 Key: HBASE-17031
                 URL: https://issues.apache.org/jira/browse/HBASE-17031
             Project: HBase
          Issue Type: Bug
          Components: Scanners
            Reporter: Ashu Pachauri
            Priority: Minor


If a scan is passed with a null start row, it fails very deep in the call stack. We should
validate start and end rows for not null before launching the scan.
Here is the associated jstack:

{code}
java.lang.RuntimeException: java.lang.NullPointerException
	at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:219)
	at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:326)
	at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:301)
	at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:166)
	at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:161)
	at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:798)

Caused by: java.lang.NullPointerException
	at org.apache.hadoop.hbase.util.Bytes.compareTo(Bytes.java:1225)
	at org.apache.hadoop.hbase.util.Bytes$ByteArrayComparator.compare(Bytes.java:158)
	at org.apache.hadoop.hbase.util.Bytes$ByteArrayComparator.compare(Bytes.java:147)
	at org.apache.hadoop.hbase.types.CopyOnWriteArrayMap$ArrayHolder.find(CopyOnWriteArrayMap.java:892)
	at org.apache.hadoop.hbase.types.CopyOnWriteArrayMap.floorEntry(CopyOnWriteArrayMap.java:169)
	at org.apache.hadoop.hbase.client.MetaCache.getCachedLocation(MetaCache.java:79)
	at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getCachedLocation(ConnectionManager.java:1391)
	at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegionInMeta(ConnectionManager.java:1231)
	at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegion(ConnectionManager.java:1183)
	at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.getRegionLocations(RpcRetryingCallerWithReadReplicas.java:305)
	at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:156)
	at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:60)
	at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:211)
	... 30 more
{code}



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