[HBASE-15390] Unnecessary MetaCache evictions cause elevated number of requests to meta

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.3.0, 2.0.0
• Component/s: Client
• Assignee: Mikhail Antonov
• Reporter: Mikhail Antonov
• Created: 04/Mar/16 05:04
• Updated: 14/Apr/16 18:44
• Resolved: 16/Mar/16 23:56

Description

• In ClientExceptionsUtil#findException() we don't unwrap correctly all remote exceptions but a few selected ones;
  more specifically, we don't unwrap correctly all remote exceptions where getCause() exception doesn't have a constructor (String message)
• In AsyncProcess#receiveGlobalFailure() we don't check for #isMetaClearingException() if tableName is null
• We don't have metric on client side to track number of cache drops

Issue Links

• breaks: HBASE-15524 Fix NPE in client-side metrics
• is related to: HBASE-15137 CallTimeoutException and CallQueueTooBigException should trigger PFFE