PM51700: "USERRASETEQUALS" ENABLED BY DEFAULT TO AVOID DEADLOCK

Fixes are available

APAR status

Closed as program error.

Error description

The servant abends caused by hung threads in JDBC Driver.
After 5 minutes of seeing the hang, the control region (CR)
kills the servant.

The method com.ibm.ws.rsadapter.spi.WSManagedConnectionFactor
Impl$Equals.checkPrivateCredentials() in J2C component is
causing a deadlock.  This method checkPrivateCredentials() is
expected to be invoked in multi threaded environment.

The "useRRASetEquals" datasource property is being enabled by
default to completely avoid this deadlock.

Local fix

```
N/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server                                      *
****************************************************************
* PROBLEM DESCRIPTION: The "useRRASetEquals" property          *
*                      (PK69110) should be enabled by          *
*                      default to avoid a deadlock             *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
APAR PK69110 addressed a deadlock issue due to the JDK's
implementation of Subject.equals() being synchronized. The
problem was fixed using an unsynchronized equals. And in order
to enable APAR PK69110, a datasource custom property
"useRRASetEquals" has to be set.
Now through APAR PM51700 the fix for PK69110 will be enabled
by default, which means the property "useRRASetEquals" will be
set to true by default internally by the WebSphere adapter
component.

Problem conclusion

WebSphere RRA component has been updated to ensure that
"useRRASetEquals" will be enabled by default.
The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.23  Please refer to the Recommended Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PM51700
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-11-07
Closed date
2012-02-15
Last modified date
2012-02-15

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
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R700 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 October 2021

Tips

PM51700: "USERRASETEQUALS" ENABLED BY DEFAULT TO AVOID DEADLOCK

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R700 PSY

Document Information

Share your feedback

Need support?