PK75733: JAVA.LANG.NULLPOINTEREXCEPTION FROM ELEVALUATOR

Fixes are available

APAR status

Closed as program error.

Error description

APAR PK57072 explicitly tries to prevent the cache from being
accessed while running a validate:

Evaluator.validate has a snippet like this:
sEvaluator.setBypassCache(true);
sEvaluator.parseExpressionString (pAttributeValue);
sEvaluator.setBypassCache(false);

However, this code is not thread safe if multiple threads are
sharing an Evaluator instance.

Local fix

```
non
```

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server users of   *
*                  JavaServer Pages Standard Tag Library       *
*                  (JSTL).                                     *
****************************************************************
* PROBLEM DESCRIPTION: There is a small timing window in       *
*                      which a NullPointerException could be   *
*                      thrown from ELEvaluator during the      *
*                      compilation of a JavaServer Page        *
*                      (JSP) if multiple JSP compilations      *
*                      occur at the same time and share an     *
*                      Evaluator object.                       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The following exception will be seen in the log when this
error occurs:
Root Cause:java.lang.NullPointerException
at
org.apache.taglibs.standard.lang.jstl.ELEvaluator.parseExpressio
nString(
Unknown Source)
at
org.apache.taglibs.standard.lang.jstl.Evaluator.validate(Unknown
Source)
The jsp will compile upon the next request.

Problem conclusion

JSTL code has been modified to prevent the
NullPointerException from occuring.

The fix for this APAR is currently targeted for inclusion in
fixpacks 6.0.2.33, 6.1.0.23, and 7.0.0.3.  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
PK75733
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
2008-11-17
Closed date
2008-11-24
Last modified date
2008-12-05

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

R60A PSY
UP
R60H PSY
UP
R60I PSY
UP
R60P PSY
UP
R60S PSY
UP
R60W PSY
UP
R60Z PSY
UP
R61A PSY
UP
R61H PSY
UP
R61I PSY
UP
R61P PSY
UP
R61S PSY
UP
R61W PSY
UP
R61Z PSY
UP
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":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 December 2021

Tips

PK75733: JAVA.LANG.NULLPOINTEREXCEPTION FROM ELEVALUATOR

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

R60A PSY

R60H PSY

R60I PSY

R60P PSY

R60S PSY

R60W PSY

R60Z PSY

R61A PSY

R61H PSY

R61I PSY

R61P PSY

R61S PSY

R61W PSY

R61Z PSY

R700 PSY

Document Information

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