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https://issues.apache.org/jira/browse/HBASE-6856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Iancu updated HBASE-6856:
--------------------------------
Description:
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/%3CCAOcnVr3R-LqtKhFsk8Bhrm-YW2i9O6J6Fhjz2h7q6_sxvwd2yw%40mail.gmail.com%3E
was:
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
> 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
> Labels: LeaseException
>
> 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/%3CCAOcnVr3R-LqtKhFsk8Bhrm-YW2i9O6J6Fhjz2h7q6_sxvwd2yw%40mail.gmail.com%3E
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