Sergey Shelukhin created HBASE-7317:
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Summary: server-side request problems are hard to debug
Key: HBASE-7317
URL: https://issues.apache.org/jira/browse/HBASE-7317
Project: HBase
Issue Type: Brainstorming
Components: IPC/RPC, regionserver
Reporter: Sergey Shelukhin
Priority: Minor
I've seen cases during integration tests where the write or read request took
an unexpectedly large amount of time (that, after the client went to the region
server that is reported alive and well, which I know from temporary debug
logging :)), and it's impossible to understand what is going on on the server
side, short of catching the moment with jstack.
Some solutions (off by default) could be
- a facility for tests (especially integration tests) that would trace
Server/Master calls into some log or file (won't help with internals but at
least one could see what was actually received);
- logging the progress of requests between components inside master/server
(e.g. "request id=N received", "request id=N is being processed in MyClass", N
being drawn on client from local sequence - no guarantees of uniqueness are
necessary).
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