Mikhail Antonov created HBASE-15677:
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Summary: FailedServerException shouldn't clear MetaCache
Key: HBASE-15677
URL: https://issues.apache.org/jira/browse/HBASE-15677
Project: HBase
Issue Type: Sub-task
Components: Client
Affects Versions: 1.3.0
Reporter: Mikhail Antonov
Assignee: Mikhail Antonov
Fix For: 1.3.0
Right now FailedServerException clears meta cache. Seems like it's unnecessary
(if we hit that, someone has already gotten some network/remote error in the
first place and invalidated located cache for us), and seems it could lead to
unnecessary drops, as FailedServers cache has default TTL of 2 seconds, so we
can encounter situation like this:
- thread T1 hit network error and cleared the cache, put server in failed
server list
- thread T2 tries to get it's request in and gets FailedServerException
- thread T1 does meta scan to populate the cache
- thread T2 clears the cache after it's got FSE.
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