Bug #77099 MySQL Cluster Node goes down (LCP Watchdog detects ERROR 7200 in DBLQH (Line:239
Submitted: 19 May 2015 23:22 Modified: 20 Jun 2015 11:16
Reporter: Gord Taylor Email Updates:
Status: No Feedback Impact on me:
Category:MySQL Cluster: Cluster (NDB) storage engine Severity:S3 (Non-critical)
Version:5.6.15 OS:Other (SmartOS (OpenSolaris))
Assigned to: MySQL Verification Team CPU Architecture:Any

[19 May 2015 23:22] Gord Taylor
Node appeared offline when using:

ndb_mgm -e 'show'

Node could not be restarted:

ndb_mgm -e  '4 restart'

Error log reported:

Time: Monday 18 May 2015 - 03:08:18
Status: Temporary error, restart node
Message: LCP fragment scan watchdog detected a problem.  Please report a bug. (Internal error, programming error or missing error message, please report a bug)
Error: 7200
Error data: Please report this as a bug. Provide as much info as possible, expecially all the ndb_*_out.log files, Thanks. Shutting down node due to lack of LCP fragment scan progress
Error object: DBLQH (Line: 23931) 0x00000002
Program: ndbd
Pid: 8985

Killed processes, then restarted manually, on the node, using:

/opt/ghc/services/mysql/mysql-cluster/bin/ndbd --defaults-file=/opt/ghc/dbroots/mysql_01/etc/my.cnf

How to repeat:
First time this happened.
[20 May 2015 11:16] MySQL Verification Team
Hi Gord,

What version of the Cluster are you running?

This problem used to happen on older MySQL Cluster version during high IO load scenarios. The latest MySQL Cluster releases do not normally have this problem.

All best
Bogdan Kecman
[21 Jun 2015 1:00] Bugs System
No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".