APAR status
Closed as program error.
Error description
When using AttachAPI on multiple JVMs at same time there is an observed long delay or pause . stack Trace: OverlappingFileLockException might occur after the long delay or pause Cause of exception is java.nio.channels.OverlappingFileLockException: sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java) sun.nio.ch.SharedFileLockTable.add(FileLockTable.java) sun.nio.ch.FileChannelImpl.lock(FileChannelImpl.java) java.nio.channels.FileChannel.lock(FileChannel.java) openj9.internal.tools.attach.target.FileLock.lockFile(FileLock.j ava) openj9.internal.tools.attach.target.CommonDirectory.obtainAttach Lock(CommonDirectory.java) com.ibm.tools.attach.attacher.OpenJ9VirtualMachine.tryAttachTarg et(OpenJ9VirtualMachine.java)
Local fix
Problem summary
The problem is caused when AttachAPI is used simultaneously on multiple JVM's waiting for lock objects
Problem conclusion
The JVM has been updated to reduce the long delays by properly handling exceptions and reducing timeout for error recovery. PR: https://github.com/eclipse-openj9/openj9/pull/13140 . This APAR will be fixed in the following Java Releases: 8 SR6 FP36 (8.0.6.36) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IJ34905
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2021-09-12
Closed date
2021-09-12
Last modified date
2021-09-12
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R270 PSY
UP
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Document Information
Modified date:
21 February 2022