Odd random console message ...

JeffTucker

Posts: 8,218
Registered: 31-Jan-2006

Odd random console message
Posted: 6 Nov 24, 18:43

For quite a while, I've been getting this error showing in the console upon launching jAlbum, with Neptune as my default skin. It isn't reproducible, and it doesn't seem to do any harm. It's just mysterious. What makes it even stranger is that I haven't run the multi-maker in quite a while - I've been doing just single projects.

Startup: 3.518s
Skin loading: 1.083s
java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
	at java.base/java.util.ArrayList$Itr.next(Unknown Source)
	at se.datadosen.jalbum.JMultiMaker.lambda$init$29(JMultiMaker.java:925)
	at java.base/java.util.Iterator.forEachRemaining(Unknown Source)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(Unknown Source)
	at se.datadosen.jalbum.JMultiMaker.lambda$init$30(JMultiMaker.java:923)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Skin loading: 0.558s

I can't detect any pattern to it, alas.

davidekholm

Posts: 3,472
Registered: 18-Oct-2002

Re: Odd random console message
Posted: 7 Nov 24, 13:35

in response to: JeffTucker

Reply

I've seen it on occasion. This one is harmless. I've canceled the error printout for future versions. A core update should take care of it.

JeffTucker

Posts: 8,218
Registered: 31-Jan-2006

Re: Odd random console message
Posted: 7 Nov 24, 13:44

in response to: davidekholm

Reply

Glad I'm not the only one. True, so harmless that I often don't even notice it.

Thanks.

JeffTucker

Posts: 8,218
Registered: 31-Jan-2006

Re: Odd random console message
Posted: 25 Nov 24, 20:11

in response to: davidekholm

Reply

I've started seeing this one again. jAlbum 36.0.5. Very random - even repeating exactly the same sequence again, which usually consists of launching, changing to a different project group, then opening an existing project, doesn't cough it up again.

davidekholm

Posts: 3,472
Registered: 18-Oct-2002

Re: Odd random console message
Posted: 25 Nov 24, 22:52

in response to: JeffTucker

Reply

Please include a stack trace. I can imagine it's the other of the two competing threads that spits out that error.

JeffTucker

Posts: 8,218
Registered: 31-Jan-2006

Re: Odd random console message
Posted: 25 Nov 24, 23:01

in response to: davidekholm

Reply

That's the entire error, shown in the console. I'm not getting a crash, and there's no dump file. Remind me again, how would I get it to provide a more detailed trace?

ETA: Never mind - it's the "Dump threads" icon in the console, right? I'll watch for a repetition of the error - it's very, very random.

JeffTucker

Posts: 8,218
Registered: 31-Jan-2006

Re: Odd random console message
Posted: 26 Nov 24, 19:48

in response to: JeffTucker

Reply

thread-dump.txt (33.5 KB)

Saw it when it happened this time. Thread dump attached.

davidekholm

Posts: 3,472
Registered: 18-Oct-2002

Re: Odd random console message
Posted: 27 Nov 24, 12:59

in response to: JeffTucker

Reply

Sorry, I need the stack trace produced automatically when the error occurs, the thread dump you get when manually hitting "Dump threads" won't do it.

JeffTucker

Posts: 8,218
Registered: 31-Jan-2006

Re: Odd random console message
Posted: 27 Nov 24, 13:19

in response to: davidekholm

Reply

Just this, in the console:

Startup: 5.116s
Skin loading: 1.131s
java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
	at java.base/java.util.ArrayList$Itr.next(Unknown Source)
	at se.datadosen.jalbum.JMultiMaker.lambda$init$29(JMultiMaker.java:927)
	at java.base/java.util.Iterator.forEachRemaining(Unknown Source)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(Unknown Source)
	at se.datadosen.jalbum.JMultiMaker.lambda$init$30(JMultiMaker.java:925)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Project file prior to Neptune 115
Skin loading: 0.479s

davidekholm

Posts: 3,472
Registered: 18-Oct-2002

Re: Odd random console message
Posted: 28 Nov 24, 21:05

in response to: JeffTucker

Reply

Ok, odd that it prints that one, but I think I might be able to choke that error message for the coming release.