Server error with 2 batch processors

Classic Servoy
1

Our solution usually runs with a single batch processor (that will then spawn some headless clients to do some processing). Recently I’ve added a second, separate batch processor to do another kind of work and have been occasionally getting the following error when starting the App Server:

java.util.ConcurrentModificationException 
     at java.util.HashMap$HashIterator.nextEntry(Unknown Source) 
     at java.util.HashMap$ValueIterator.next(Unknown Source) 
     at com.servoy.j2db.persistence.ServerProxy.combineTables(ServerProxy.java:121) 
     at com.servoy.j2db.FlattenedSolution.combineServerProxies(FlattenedSolution.java:605) 
     at com.servoy.j2db.FlattenedSolution.setSolutionAndModules(FlattenedSolution.java:535) 
     at com.servoy.j2db.FlattenedSolution.setSolution(FlattenedSolution.java:501) 
     at com.servoy.j2db.ClientState.loadSolutionsAndModules(ClientState.java:1348) 
     at com.servoy.j2db.server.headlessclient.SessionClient.loadSolution(SessionClient.java:266) 
     at com.servoy.j2db.server.headlessclient.SessionClient.loadSolution(SessionClient.java:242) 
     at com.servoy.j2db.server.headlessclient.HeadlessClientFactoryInternal$1.run(HeadlessClientFactoryInternal.java:64) 
     at com.servoy.j2db.server.headlessclient.HeadlessClientFactoryInternal.createSessionBean(HeadlessClientFactoryInternal.java:76) 
     at com.servoy.j2db.server.headlessclient.HeadlessClientFactoryInternal.createHeadlessClient(HeadlessClientFactoryInternal.java:40) 
     at com.servoy.j2db.server.Zb.Zf.Zc(Zf.java:29) 
     at com.servoy.j2db.server.Zb.Ze.run(Ze.java:2) 
     at java.lang.Thread.run(Unknown Source)

When this happens, the original batch processor (which is the second one in the list of batch processors due to alphabetical sorting) fails to run and I can see a client with no solution loaded in the Clients area of the Administration area.

If I then kill this client, and manually start the batch processor, it appears to work correctly.

2

James,

Which version of Servoy is this?
We have made some fixes in that area recently.

Rob

3

Sorry, should have included that the first time!

Servoy version 5.2.11 -build 1022

4

James,

This is already fixed in Servoy 6.

Rob

5

Hi Rob,

There will be no backport to the 5.2 branch ?

6

+1

7

Getting a back port to 5.2 on this would be beyond helpful. One of the reasons we’re deploying a second batch processor with our next update is to enable us to need fewer reasons to log into all of our remote app servers. Introducing a reason that we would need to log in anytime the server gets restarted isn’t really an option for us and will force us to have to reschedule an entire feature set until after we have time to switch to Servoy 6.

8

James,

This is backported for the next v5.2 release.

Rob

9

Thank you!