Bug #76586 | Lock during simultaneous disconnect and connect to cluter | ||
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Submitted: | 3 Apr 2015 11:33 | Modified: | 28 Jul 2015 14:40 |
Reporter: | Mike Pentagra | Email Updates: | |
Status: | Verified | Impact on me: | |
Category: | MySQL Cluster: NDB API | Severity: | S2 (Serious) |
Version: | 7.3.7 | OS: | Linux |
Assigned to: | CPU Architecture: | Any |
[3 Apr 2015 11:33]
Mike Pentagra
[3 Apr 2015 11:34]
Mike Pentagra
Stack traces of threads that contain NDB API
Attachment: stacks.txt (text/plain), 128.74 KiB.
[7 Jul 2015 11:33]
Mikael Ronström
Looked at the stack trace and it looks very similar to a bug we just fixed where you had to change do_poll(0) to do_poll(10) in the close_clnt-method. In this bug however the management server was the problem and went to 100% CPU usage. From looking at the trace I see 60 threads blocked on the mutex and one thread that actually does proceed and doesn't seem stuck. I think this bug fix is coming in 7.3.10.
[28 Jul 2015 14:43]
MySQL Verification Team
Hi Mike, Thanks for your report. I verified this bug on 7.3.9. I did not manage to verify on 7.3.10 so it seems it is solved in 7.3.10 but I can't confirm 100% as I don't have reliable way of reproducing the problem. all best Bogdan Kecman