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https://issues.apache.org/jira/browse/HBASE-15703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Antonov updated HBASE-15703:
------------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Release Note:
With previous deadline mode of RPC scheduling (the implementation in
SimpleRpcScheduler, which is basically a FIFO except that long-running scans
are de-prioritized) and FIFO-based RPC scheduler clients are getting
CallQueueTooBigException when RPC call queue is full.
With this patch and when hbase.ipc.server.callqueue.type property is set to
"codel" mode, clients will also be getting CallDroppedException, which means
that the request was discarded by the server as it considers itself to be
overloaded and starts to drop requests to avoid going down under the load. The
clients will retry upon receiving this exception. It doesn't clear MetaCache
with region locations.
Status: Resolved (was: Patch Available)
Thanks [~eclark]. Pushed to master, branch-1, branch-1.3.
> Deadline scheduler needs to return to the client info about skipped calls,
> not just drop them
> ---------------------------------------------------------------------------------------------
>
> Key: HBASE-15703
> URL: https://issues.apache.org/jira/browse/HBASE-15703
> Project: HBase
> Issue Type: Bug
> Components: IPC/RPC
> Affects Versions: 1.3.0
> Reporter: Mikhail Antonov
> Assignee: Mikhail Antonov
> Priority: Critical
> Fix For: 1.3.0
>
> Attachments: HBASE-15703-branch-1.3.v1.patch,
> HBASE-15703-branch-1.3.v2.patch
>
>
> In AdaptiveLifoCodelCallQueue we drop the calls when we think we're
> overloaded, we should instead return CallDroppedException to the cleent or
> something.
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