transactions using scripts result in timeouts

Question

In JIRA 6.4 we have some transactions, that use scripted postfunctions or scripted values of customfields. From time to time (around once per day) the workflows stop working and the transactions result in a timeout.

For example: If a subtask fetches some information from the parent during creation, it will not finish.

To make it work again, we have to restart the complete JIRA isntallation.

Nothing is shown in the log. It seems, that the request does not reach the system at all. Network is not an issue as performing other steps at the same time from the same computer work.

Can anybody point me to somewhere to start to inverstigate. JIRA is not usable with this issue.

Andreas Sumper · Answer

Firt of all, Sorry for not writing back earlier, as I had many things to finish in the last year. Now I can concentrate on the issue again.

Currently it seems, that it is not the script but other things, as it also occurs in other projects when creating subtasks.

We are fetching fields from parent task to the created subtasks in the subtask-workflow-create-function. It seems, that this fetching causes the problems. If some of the fields are set in the "new"-screen, it works.

I changed my script to use another logfile, as we are having tons of entries in the logfile. As soon as it occurs again, I will give more information on that.

I also monitor the JIRA installation with jconsole. the memory rises up to 8GB (which is the limit) and when the garbage-collection starts, it goes down to 2,5GB.

JamieA · Answer

Sounds like a possible deadlock. But I don't think it's anything intrinsic in the plugin, there are plenty of large sites running many script functions all day.

You need to get a thread dump when the system becomes unresponsive or when the bad behaviour starts... how you do that varies depending on the server OS, but Atlassian have plenty of documentation on how.

> I have a stack trace from one of the last crashes (happens around once per day)

A crash seems different from what you're describing, but please give us the stack trace or create a request here: https://productsupport.adaptavist.com/servicedesk/customer/portal/3

Andreas Sumper · Answer

Jira is 6.4.9 build 64024
Java is 1.8.0_40
ScriptRunner Plugin is 4.1.1 (same behavior on 3.1.4)
I have a stack trace from one of the last crashes (happens around once per day)
The system is not having a very high load, when it comes to a crash.