[Bugs] [Bug 1475632] Brick Multiplexing: Brick process crashed at changetimerecorder(ctr) translator when restarting volumes

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1475632



--- Comment #2 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/17888 committed in master by Jeff Darcy
(jeff at pl.atyp.us) 
------
commit fc0fce2c8f0f4c9ca373fdc754cab6359c9fcdcb
Author: Mohit Agrawal <moagrawa at redhat.com>
Date:   Thu Jul 27 09:25:32 2017 +0530

    changetimerecorder: Brick process crashed at ctr xlator in notify function

    Problem: Sometime brick process is getting crash in notify function at the
             time of cleanup db connection while brick mux is enabled.

    Solution: In changetimerrecorder (ctr) notify function after cleanup
              db connection set to db_conn to NULL to avoid reuse the same
              db connection again.

    Note: Below is the backtrace pattern showing by brick process
          #0  0x00007ff98a30c1f7 in raise () from /lib64/libc.so.6
          #1  0x00007ff98a30d8e8 in abort () from /lib64/libc.so.6
          #2  0x00007ff98a34bf47 in __libc_message () from /lib64/libc.so.6
          #3  0x00007ff98a351b54 in malloc_printerr () from /lib64/libc.so.6
          #4  0x00007ff98a3537aa in _int_free () from /lib64/libc.so.6
          #5  0x00007ff97d95e311 in gf_sql_connection_fini
(sql_connection=sql_connection at entry=0x7ff8e8496b50) at gfdb_sqlite3.c:42
          #6  0x00007ff97d95e38a in gf_sqlite3_fini (db_conn=0x7ff92ca04470) at
gfdb_sqlite3.c:507
          #7  0x00007ff97d957156 in fini_db (_conn_node=0x7ff92ca04470) at
gfdb_data_store.c:326
          #8  0x00007ff97db78679 in notify (this=0x7ff92c5b3670, event=9,
data=0x7ff92c5b5a00) at changetimerecorder.c:2178
          #9  0x00007ff98bca0dc2 in xlator_notify (xl=0x7ff92c5b3670,
event=event at entry=9, data=data at entry=0x7ff92c5b5a00) at xlator.c:549
          #10 0x00007ff98bd3ac12 in default_notify
(this=this at entry=0x7ff92c5b5a00, event=9, data=data at entry=0x7ff92c5b6d50) at
defaults.c:3139

    BUG: 1475632
    Change-Id: Idd4bfdb4629c4799ac477ade81228065212683fb
    Signed-off-by: Mohit Agrawal <moagrawa at redhat.com>
    Reviewed-on: https://review.gluster.org/17888
    Reviewed-by: Jeff Darcy <jeff at pl.atyp.us>
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Atin Mukherjee <amukherj at redhat.com>

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