PK71207: LINKAGEERROR IF JSP CONTAINER ATTEMPTS TO CALL THE CLASSLOADER''S DEFINED CLASS METHOD.

Fixes are available

APAR status

Closed as program error.

Error description

A java.lang.LinkageError can occur if the JavaServer Pages
(JSP) Container attempts to call the ClassLoader's defineClass
method for the same class from multiple requests at the same
time.

Local fix

```
N/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server version    *
*                  6.1 users of JavaServer Pages (JSP).        *
****************************************************************
* PROBLEM DESCRIPTION: A java.lang.LinkageError can occur      *
*                      when multiple JSP requests              *
*                      simultaneously attempt to load the      *
*                      same class file.                        *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When the JSP Container is simultaneously processing multiple
requests for a JSP file, there is small timing window where
these multiple requests can attempt to define the class file
on the ClassLoader.  This can lead to the following error:
java.lang.LinkageError: com.ibm.ws.jsp.sample.MySampleJSP
 at java.lang.ClassLoader.defineClassImpl(Native Method)
 at java.lang.ClassLoader.defineClass(ClassLoader.java:256)
 at java.lang.ClassLoader.defineClass(ClassLoader.java:193)
 at
com.ibm.ws.jsp.webcontainerext.JSPExtensionClassLoader.defClass(
JSPExtensionClassLoader.java:152)
 at
com.ibm.ws.jsp.webcontainerext.JSPExtensionClassLoader._loadClas
s(JSPExtensionClassLoader.java:126)
 at
com.ibm.ws.jsp.webcontainerext.JSPExtensionClassLoader.loadClass
(JSPExtensionClassLoader.java:69)
 at
com.ibm.ws.jsp.webcontainerext.JSPExtensionClassLoader.loadClass
(JSPExtensionClassLoader.java:51)

Problem conclusion

The JSP Container was modified so that it will attempt to load
the class again if another request has already defined it.

The fix for this APAR is currently targeted for inclusion in
fixpack 6.1.0.23.  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
PK71207
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
61A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2008-08-27
Closed date
2008-09-16
Last modified date
2008-09-16

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

R61A PSY
UP
R61H PSY
UP
R61I PSY
UP
R61P PSY
UP
R61S PSY
UP
R61W 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":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 December 2021

Tips

PK71207: LINKAGEERROR IF JSP CONTAINER ATTEMPTS TO CALL THE CLASSLOADER''S DEFINED CLASS METHOD.

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

R61A PSY

R61H PSY

R61I PSY

R61P PSY

R61S PSY

R61W PSY

Document Information

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