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Posted to issues@hbase.apache.org by "Caroline (JIRA)" <ji...@apache.org> on 2019/05/08 00:34:00 UTC

[jira] [Created] (HBASE-22378) HBase Canary fails with TableNotFoundException when table deleted during Canary run

Caroline created HBASE-22378:
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             Summary: HBase Canary fails with TableNotFoundException when table deleted during Canary run
                 Key: HBASE-22378
                 URL: https://issues.apache.org/jira/browse/HBASE-22378
             Project: HBase
          Issue Type: Bug
          Components: canary
    Affects Versions: 1.4.0, 1.3.0, 1.5.0
            Reporter: Caroline


In 1.3.2 branch-1, we saw a drastic increase in TableNotFoundExceptions thrown by HBase Canary. We traced the issue back to Canary trying to call isTableEnabled() on temporary tables that were deleted in the middle of the Canary run.

In this version of HBase Canary, Canary throws TableNotFoundException (and then fails) if a table is deleted between admin.listTables() and admin.tableExists() function calls in RegionMonitor's sniff() method. Following the goal of sniff(), which is to query all existing tables, in order to reduce noise we should skip over a table (i.e. don't check if it was enabled, or do anything else with it at all) if it was returned in listTables() but deleted before Canary can query it. Temporary tables which are not meant to be kept should not throw TableNotFoundExceptions which fail the Canary.



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