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From "Jianfeng Jia (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ASTERIXDB-2113) A large (58G) component is generated when use correlated policy
Date Thu, 28 Sep 2017 21:38:00 GMT
Jianfeng Jia created ASTERIXDB-2113:
---------------------------------------

             Summary: A large (58G) component is generated when use correlated policy
                 Key: ASTERIXDB-2113
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2113
             Project: Apache AsterixDB
          Issue Type: Bug
          Components: STO - Storage
         Environment: 0.9.2-SNAPSHOT
"git.commit.time": "07.08.2017 @ 09:54:02 PDT",
            Reporter: Jianfeng Jia
            Assignee: Chen Luo


The symptom of the problem is that AsterixDB generates a 58G component on disk that the filtering
technique cannot speed up the query anymore. 

The source of the bug is ASTERIXDB-2081 which prevented the recovery after the restart. Then
we remove the log files on the failed-to-recover nodes to skip the recovery. When the failed
node restart from a clean history it somehow decide to merge a large number of historical
components into a huge one. Though the system is already in an inconsistent state, I wonder
if it is possible that we operate some defensive check to prevent generating this huge component?




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