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Re: Wait LCP to ensure durability
Posted by: Mikael Ronström
Date: November 25, 2017 07:33AM

I did some analysis of your problem.
I got a strong feeling that I saw the same problem and fixed
it before.
It took some searching, but I eventually found the following
commit e3f905ccb844db3cf9da7bc6917c49c3fd8d3eeb
Author: Mikael Ronström <mikael.ronstrom@oracle.com>
Date: Fri Jun 2 13:49:31 2017 +0200

WL#10302: BUG#26166901: Possible to get hang of LCP due to a node failure at a very inopportune timing when all nodes waited for this node to complete its last fragments

This bug is fixed in the latest 7.6 DMR, it is currently not fixed
in the latest 7.5 tree.

The problem is that the node failure of node 6 seem to have occurred
at a very inopportune timing. It is a very rare bug.

I noted that you were planning a system restart. I would first attempt
to restart only node 3. This is the node that the master node (nodeid = 5)
is waiting for to report completion.

So if it dies it should clear the wait bits and hopefully the LCP gets
going again. After that you can start up 3 and 6 again.

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