PI78738: Loop while closing an SSL connection

Fixes are available

APAR status

Closed as program error.

Error description

When an SSL connection is closing the SSL Channel could
potentially loop

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server Liberty    *
*                  and WebSphere Application Server            *
*                  Traditional version 8.5.5 and 9.0 users of  *
*                  SSL                                         *
****************************************************************
* PROBLEM DESCRIPTION: Sending the final close packet doesn't  *
*                      complete while closing an SSL           *
*                      connection                              *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When an SSL connection is closing, the SSL Channel could
potentially loop and the final SSL packet will not be sent. The
stack trace of the loop looks similar to this:

java.lang.Thread.yield(Native Method)
    at
com.ibm.ws.ssl.channel.impl.SSLUtils.flushCloseDown(SSLUtils.jav
a:243)
    at
com.ibm.ws.ssl.channel.impl.SSLUtils.shutDownSSLEngine(SSLUtils.
java:141)
    at
com.ibm.ws.ssl.channel.impl.SSLConnectionLink.cleanup(SSLConnect
ionLink.java:225)
    at
com.ibm.ws.ssl.channel.impl.SSLConnectionLink.close(SSLConnectio
nLink.java:169)

Problem conclusion

The SSL Channel was modified to try sending the final SSL close
packet for 30 seconds. If it doesn't complete successfully, the
connection will just be closed.

The fix for this APAR is currently targeted for inclusion in fix
pack 17.0.0.2, 9.0.0.4, and 8.5.5.12.  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
PI78738
Reported component name
WAS LIBERTY COR
Reported component ID
5725L2900
Reported release
CD0
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-03-23
Closed date
2017-05-11
Last modified date
2017-07-28

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
WAS LIBERTY COR
Fixed component ID
5725L2900

Applicable component levels

RCD0 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSD28V","label":"WebSphere Application Server Liberty Core"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"CD0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
03 May 2022

Tips

PI78738: Loop while closing an SSL connection

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

RCD0 PSY

Document Information

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