hangs confluence 6.9.1

[Richard Baar]

Hi,

confluence 6.9.1 hangs many times per day.

We tried to fix all possible warnings etc in logs, but no way how to know, why our confluence hangs.

[Mirek]

Hmm... Not too much information provided by you in order to directly say what could this be.. Any OOM (OutOfMemory) errors found in the logs? Does you confluence instance have enough resources on the machine and reserved for the application? Do you have any monitoring software to check the usage? Any Anti-Virus software running in parallel? What OS are you using overall? Did you tried to enable DEBUG mode in the logs? Are there enough DB connections reserved?

[Richard Baar]

OS is the latest updated Centos 6.9 x64.

No OOM, lot of memory, lot of CPUs, very low machine load, no antivirus, no firewall.

mysql 5.7.18, connector: mysql-connector-java-5.1.46-bin.jar

I tried to clean up all logs and turn on debug before crash:

Crash/hangup was (reported by zabbix monitoring):

15.6.2018 5:58-5:59

14.6.2018 22:06-22:07

14.6.2018 18:52-18:53

14.6.2018 16:10-16:11

(it looks like tomcat sessions hangs and times out...)

Here are debug informations:

http://repo.daktela.com/repos/Confluence_support_2018-06-15-07-47-57.zip

[Mirek]

So seems that you have collaborative editing enabled and looks like you have only 1GB reserved for heap size. When collaborative editing is enabled it is recommended to add more resources to run JIRA. Official guide for Confluence says:

minimum heap size to allocate to Confluence is 1 GB and 1 GB for Synchrony (which is required for collaborative editing)

So at least you need 2GB to make it working. I suggest you turn of Collaborative Editing and see if that helped in making Confluence more stable.

Overall I recommend adding some resources since official minimum requirements for Confluence 6.9.x are:

• CPU: Quad core 2GHz+ CPU
• RAM: 6GB
• Minimum database space: 10GB

More info you can find here:

https://confluence.atlassian.com/doc/server-hardware-requirements-guide-30736403.html

[Richard Baar]

We increased it to 2GB, now it looks little bit better. Give us 24h to confirm issue is solved.

Thank you very much!

[Mirek]

I hope it helped :)

[Richard Baar]

Still there was many serious slowdowns, so we tried to turn off Collaborative Editing.

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