APAR status
Closed as program error.
Error description
Error Message: java.lang.NullPointerException . Stack Trace: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at ibm.tools.attach.J9AttachProvider.listVirtualMachines(J9AttachPr ovider.java:46) at com.sun.tools.attach.VirtualMachine.list(VirtualMachine.java:174 ) at sun.tools.jconsole.LocalVirtualMachine.getAttachableVMs(LocalVir tualMachine.java:181) at sun.tools.jconsole.LocalVirtualMachine.getAllVirtualMachines(Loc alVirtualMachine.java:140) at sun.tools.jconsole.ConnectDialog$ManagedVmTableModel.refresh(Con nectDialog.java:746) at sun.tools.jconsole.ConnectDialog$ManagedVmTableModel.<init>(Conn ectDialog.java:737) at sun.tools.jconsole.ConnectDialog.<init>(ConnectDialog.java:146) at sun.tools.jconsole.JConsole.showConnectDialog(JConsole.java:644) . This can occur in the case where the attach API is disabled and the common directory /tmp/.com_ibm_tools_attach is absent.
Local fix
Note that attach API is disabled by default on z/OS systems. Tools such as jconsole which use attach API will produce no results in this case and should not be run.
Problem summary
The attach API returned a null if the common directory is absent.
Problem conclusion
The attach API returns an empty list if the common directory is absent. . This APAR will be fixed in the following Java Releases: 7 SR9 FP30 (7.0.9.30) 8 SR2 FP10 (8.0.2.10) 7 R1 SR3 FP30 (7.1.3.30) 6 R1 SR8 FP20 (6.1.8.20) . 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
IV79222
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-11-25
Closed date
2015-11-30
Last modified date
2015-12-01
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
R260 PSY
UP
R270 PSY
UP
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Document Information
Modified date:
21 February 2022