openjdk platform binary cpu usage grows over time

rocketman

16 days ago I restarted my server and cleared out some 280 “stuck” Execution contexts. Today, task manager reports that my cpu usage on the openjdk paltform binary process is running at 57%. This usually produces a “Tell Tale” whereby attempting to publish a new version results in “The are active processes on the server - please try again later”

This isn’t just a one off incident - It’s been happening a lot over the past 6 months, so I’m guessing it’s some modification in my code that has caused the screw up. Problem is I don’t know how to pin it down.
I’ve done some basic interrogation using jConsole, and the heap and non heap stacks seem quite normal but my knowledge of the inner workings of the JDK are somewhere between limited and non-existent.

Can anyone point me to any idiots guides, or - if you’ve had the same issue at anytime and can help me get started in hunting the problem down I’d be most grateful

Jaymer

I’d be surprised if Vlad doesn’t have a program to decode that binary data in that context record.

BLOMASKY

For ever (well, well over a year!) I have had to delete the execution_context records prior to publishing. I didn’t do a lot of testing, but looking at the records, it looks like when I have a process that has a Question, and the user just closes (or reloads) the browser, then a record gets “stuck” there.

rocketman

BLOMASKY ok, that makes sense - will investigate and report back. Thanks

rocketman

BLOMASKY
First pass - It looks like it doesn’t even need to ask a question. On the main culprit, I have the “Allow Cancel” box ticked. I completed a normal payment transaction and nothing showed up in EC (Execution context). I then started a new transaction but hit the x in the pop-up window. Two EC’s - one shows the process name, the other shows NULL

I then repeated using the “Cancel” button at the bottom of my form - same thing only this time THREE EC’s. Two with the process name with a NULL sandwiched in the middle

Anyway - I’m going to leave them “Stuck” for now and see if they are still there tomorrow. I’ll also change the code, untick the allow cancel box, put a “close” button on instead but I don’t know whether I can get rid of the x in the top right of the po-up window

rocketman

Jaymer and BLOMASKY

as ever - It’s not proving to be that simplistic. I have many processes that allow cancellation but only a couple that cause the EC issue. So I’m currently looking at all my BO “rules” to see if there is anything in them that could be causing this. There’s certainly no “DISPLAY Question” in the main culprit.

Jaymer

The X will not be there if you disable Cancel ability.