[jboss-jira] [JBoss JIRA] (JBWEB-149) Occassional NullPointerException when using the AJP Connector

[SBS JIRA Integration (JIRA)]

     [ https://issues.jboss.org/browse/JBWEB-149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

SBS JIRA Integration updated JBWEB-149:
---------------------------------------

    Forum Reference: https://community.jboss.org/message/809750#809750

    
>  Occassional NullPointerException when using the AJP Connector
> --------------------------------------------------------------
>
>                 Key: JBWEB-149
>                 URL: https://issues.jboss.org/browse/JBWEB-149
>             Project: JBoss Web
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Core
>            Reporter: Samuel Mendenhall
>            Assignee: Remy Maucherat
>
> ERROR 2009-04-30 10:54:14,547 [ajp-xxxxxxxxxxxxxxxx%2F10.230.10.131-22803-2][][] org.apache.coyote.ajp.AjpMessage 'Cannot append null value'
> java.lang.NullPointerException
>        at org.apache.coyote.ajp.AjpMessage.appendString(AjpMessage.java:242)
>        at org.apache.coyote.ajp.AjpMessage.appendBytes(AjpMessage.java:178)
>        at org.apache.coyote.ajp.AjpProcessor.prepareResponse(AjpProcessor.java:961)
>        at org.apache.coyote.ajp.AjpProcessor.action(AjpProcessor.java:495)
>        at org.apache.coyote.Response.action(Response.java:183)
>        at org.apache.coyote.Response.sendHeaders(Response.java:379)
>        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:305)
>        at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:273)
>        at org.apache.catalina.connector.Response.finishResponse(Response.java:486)
>        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:257)
>        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
>        at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:381)
>        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>        at java.lang.Thread.run(Thread.java:619) 
> The fix Jean-Frederic highlighted being:
> src/share/classes/org/apache/coyote/ajp/AjpProcessor.java
>         responseHeaderMessage.appendInt(numHeaders);
>         for (int i = 0; i < numHeaders; i++) {
>             MessageBytes hN = headers.getName(i);
> +            if (hN == null || hN.toString() == null)
> +                continue;
>             int hC = Constants.getResponseAjpIndex(hN.toString());
>             if (hC > 0) {
>                 responseHeaderMessage.appendInt(hC);
> +++
> Which, after using a patched jar, the customer has not seen the NPE since.

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