PI82426: INCORRECT OUTPUT FOR JSP IN AN EXPRESSION TAG WHEN USING CERTAIN STRING CONCATENATIONS.

Fixes are available

APAR status

Closed as program error.

Error description

The JSP parser is generating incorrect code when concatenating
a string constant to an integer which also uses the ++ operator
inside an expression tag.  An example of the JSP code which
will cause the problem is:

<% int i = 0;%>
<%= "month" + i++%>

This produces the following lines of code (shown when
keepgenerated is set):

out.write( "month" );
out.print( i);
out.print( i+);

This APAR will resolve the problem.

Local fix

Altering the JSP code so that the string is not constant, such
as:

<%
int i = 0;
String month = "month";

%>
<%= month + i++%>

This will work around the problem and produce correct output.

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server                                      *
*                  Traditional profile versions 8.5.5 and 9.0  *
*                  and Liberty profile - JavaServer Pages      *
*                  (JSP)                                       *
*                  2.2 and 2.3                                 *
****************************************************************
* PROBLEM DESCRIPTION: Some JSP expressions concatenating a    *
*                      string with an incremental variable     *
*                      might generate incorrect output.        *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The following JSP expressions, most of which concatenate a
string with an incremental variable
(i.e. i++ or ++i), will generate incorrect output: (assuming
variable 'i' has been declared and
initialized)
<%= "test" + i++%>
<%= i++%> (notice the lack of a whitespace char before '%')
<%= i++ + "test" %>

Problem conclusion

The JSP engine has been modified to generate the right output
to each of the problematic cases mentioned in the problem
summary.

The fix for this APAR is currently targeted for inclusion in
fix packs 8.5.5.13, 9.0.0.5, and 17.0.0.14.  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
PI82426
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-06-01
Closed date
2017-08-31
Last modified date
2018-02-28

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
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI82426: INCORRECT OUTPUT FOR JSP IN AN EXPRESSION TAG WHEN USING CERTAIN STRING CONCATENATIONS.

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

R850 PSY

Document Information

Share your feedback

Need support?