Daniel Iancu created HBASE-6856:
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Summary: Document the LeaseException thrown in scanner next
Key: HBASE-6856
URL: https://issues.apache.org/jira/browse/HBASE-6856
Project: HBase
Issue Type: Improvement
Components: documentation
Affects Versions: 0.92.0
Reporter: Daniel Iancu
In some situations clients that fetch data from a RS get a LeaseException
instead of the usual ScannerTimeoutException/UnknownScannerException.
This particular case should be documented in the HBase guide.
Some key points
* the source of exception is:
org.apache.hadoop.hbase.regionserver.Leases.removeLease(Leases.java:230)
* it happens in the context of a slow/freezing RS#next
* it can be prevented by having hbase.rpc.timeout >
hbase.regionserver.lease.period
Harsh J investigated the issue and has some conclusions, see
http://mail-archives.apache.org/mod_mbox/hbase-user/201209.mbox/browser
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