We are getting a lot of warnings for failed to inspect build.xmls including old jobs. This also seems to be related to sudden memory consumption by jenkins which causes application to be unresponsive.

Here a few details:

Warning found in catalina.out log:
This also seems to be related to warning like these:
Failed to inspect /var/hudson/master/jobs/strucfin-core/modules/com.markit.strucfin$sf-core/builds/2011-04-09_22-30-21: /var/hudson/master/jobs/strucfin-core/modules/com.markit.strucfin$sf-core/builds/2011-04-09_22-30-21/build.xml doesn't exist
Failed to inspect /var/hudson/master/jobs/strucfin-core/modules/com.markit.strucfin$sf-core/builds/2011-04-11_08-31-43: /var/hudson/master/jobs/strucfin-core/modules/com.markit.strucfin$sf-core/builds/2011-04-11_08-31-43/build.xml doesn't exist
Failed to inspect /var/hudson/master/jobs/strucfin-core/modules/com.markit.strucfin$sf-core/builds/2011-04-10_17-24-25: /var/hudson/master/jobs/strucfin-core/modules/com.markit.strucfin$sf-core/builds/2011-04-10_17-24-25/build.xml doesn't exist
Failed to inspect /var/hudson/master/jobs/strucfin-dcl/builds/1491: /var/hudson/master/jobs/strucfin-dcl/builds/1491/build.xml doesn't exist
Failed to inspect /var/hudson/master/jobs/strucfin-dcl/builds/2011-12-08_11-45-02: /var/hudson/master/jobs/strucfin-dcl/builds/2011-12-08_11-45-02/build.xml doesn't exist
Failed to inspect /var/hudson/master/jobs/strucfin-dcl/builds/2011-12-08_09-59-03: /var/hudson/master/jobs/strucfin-dcl/builds/2011-12-08_09-59-03/build.xml doesn't exist

We have more people reporting this issue but no response has been received so far. http://jenkins-ci.361315.n4.nabble.com/What-is-those-quot-WARNING-Failed-to-inspect-quot-in-the-Jenkins-logs-td4689106.html