[jira] Commented: (LANG-429) NullPointerException (NPE) in FastDateFormat.getInstance(FastDateFormat.java:211)

["Sebb (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LANG-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12592053#action_12592053 ] 

Sebb commented on LANG-429:
---------------------------

I think it's possible because the cInstanceCache field is not final - see LANG-367.

Updating to version 2.4 should fix the problem.

> NullPointerException (NPE) in FastDateFormat.getInstance(FastDateFormat.java:211)
> ---------------------------------------------------------------------------------
>
>                 Key: LANG-429
>                 URL: https://issues.apache.org/jira/browse/LANG-429
>             Project: Commons Lang
>          Issue Type: Bug
>    Affects Versions: 2.2
>         Environment: MS Windows XP (SP 2), Java 1.5.0 Update 11
>            Reporter: Kai Burjack
>
> Sometimes (sadly this is not reproducible) the following method call results in a NullPointerException (NPE):
> Stacktrace:
> java.lang.NullPointerException
>         at org.apache.commons.lang.time.FastDateFormat.getInstance(FastDateFormat.java:211)
>         at org.apache.commons.lang.time.DateFormatUtils.format(DateFormatUtils.java:258)
>         at org.apache.commons.lang.time.DateFormatUtils.format(DateFormatUtils.java:232)
> I don't know how this is actually possible, since the exception is being raised when accessing a static field 'cInstanceCache' that will be implicitly initialized...
> Could this have something to do with class gc?

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