Testsuite - fluctuant org.omg.CORBA.OBJECT_NOT_EXIST: Server-side Exception errors on RHEL4 and Sun/IBM jdk1.5

An error occurs on the combination of RHEL4 and Sun/IBM jdk1.5 in the otsserver test group. Sometimes there are 2 errors, sometimes only 1 error occurs. Error messages from the log are here:

Client14.Worker.run: org.omg.CORBA.OBJECT_NOT_EXIST: Server-side Exception: vmcid: 0x0 minor code: 0 completed: No
org.omg.CORBA.OBJECT_NOT_EXIST: Server-side Exception: vmcid: 0x0 minor code: 0 completed: No
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at org.jacorb.orb.SystemExceptionHelper.read(Unknown Source)
at org.jacorb.orb.ReplyReceiver.getReply(Unknown Source)
at org.jacorb.orb.Delegate.invoke_internal(Unknown Source)
at org.jacorb.orb.Delegate.invoke(Unknown Source)
at org.omg.CORBA.portable.ObjectImpl._invoke(ObjectImpl.java:457)
at org.omg.CosTransactions._ControlStub.get_terminator(_ControlStub.java:32)
at org.jboss.jbossts.qa.OTSServerClients.Client14$Worker.run(Client14.java:164)
[jacorb.poa] INFO : POA RootPOA destroyed

java.io.FileNotFoundException: ServerIORs (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileInputStream.<init>(FileInputStream.java:66)
at org.jboss.jbossts.qa.Utils.FileServerIORStore.removeIOR(FileServerIORStore.java:69)
at org.jboss.jbossts.qa.Utils.ServerIORStore.removeIOR(ServerIORStore.java:47)
at org.jboss.jbossts.qa.Utils.RemoveServerIORStore.main(RemoveServerIORStore.java:42)

Error logs on Hudson:
http://hudson.qa.jboss.com/hudson/view/JBossTS/job/jbossts-testsuite-matrix/jdk=java15_x86_64,label=RHEL4_x86_64/ws/trunk/qa/results/35/task_0_err/*view*/
http://hudson.qa.jboss.com/hudson/view/JBossTS/job/jbossts-testsuite-matrix/jdk=java15_x86_64,label=RHEL4_x86_64/ws/trunk/qa/results/37/task_0_err/*view*/

http://hudson.qa.jboss.com/hudson/view/JBossTS/job/jbossts-testsuite-matrix/jdk=java15_x86_64,label=RHEL4_x86_64/ws/trunk/qa/jbossts-qa-otsserver-output.txt/*view*/

Affected Hudson jobs:
http://hudson.qa.jboss.com/hudson/view/JBossTS/job/jbossts-testsuite-matrix/jdk%3djava15_x86_64,label%3dRHEL4_x86_64/
http://hudson.qa.jboss.com/hudson/view/JBossTS/job/jbossts-testsuite-matrix/jdk%3dibm15,label%3dRHEL4_x86/