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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://issues.shibboleth.net/jira/browse/OSJ-328" style="color: #3b73af; text-decoration: none">Re: NPE in IndexedXMLObjectChildrenList</a> </span> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">I have added <tt>synchronized</tt> to <tt>checkAndCreateIndex</tt>, which I think should handle the race condition around the <tt>get</tt> and <tt>subList</tt> methods in multi-threaded contexts.</p> <p style="margin: 10px 0 0 0">As always, the class is still <tt>@NotThreadSafe</tt> in general, and so the <tt>add/remove/clear</tt> methods are not expected to be safe when invoked by multiple threads. But that's ok, because in general <tt>XMLObject</tt> impls are not thread-safe for mutation either.</p> <p style="margin: 10px 0 0 0">This is hard to test. If <a href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=cantor.2%40osu.edu" class="user-hover" rel="cantor.2@osu.edu" style="color: #3b73af; text-decoration: none">Scott Cantor</a> or anyone else has the opportunity to run this "for real" under load, that's probably the best chance we have for any real testing. I'll go ahead and mark resolved, pending whatever testing confirmation we can get.</p> </td>
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