Cletus, I am having problems using this plugin for a large mks project (25K files). I have turned debugging on with: -Dorg.apache.commons.logging.simplelog.log.IntegritySCM=debug.

I also gave the Jenkins JVM 1.5GB of heap space, just to be on the safe side.

>>> The exception I get is:

Started by user anonymous
Building in workspace C:\Jenkins\jobs\MKS Test\workspace
Change Log: http://pc11065:8080/job/MKS%20Test/13/changes
Build Log: http://pc11065:8080/job/MKS%20Test/13/console
Preparing to execute si projectinfo for #p=p:/PROJEKTE/MPA/mpa.pj#s=PC_SW/pc_sw.pj#
Preparing to execute si viewproject for #p=p:/PROJEKTE/MPA/MPA.pj#s=PC_SW/pc_sw.pj
An API Exception was caught!
FATAL: Unable to retrieve WorkItem data at this point.

>>> jenkins.err.log:

INFO: Jenkins is fully up and running
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:40 AM [DEBUG] IntegritySCM - IntegrityItemAction.IntegrityItemDescriptorImpl.isApplicable executed!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - Start execution of checkout() routine...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - Creating Integrity API Session...
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegritySCM.getDescriptor() invoked...!
May 24, 2012 10:23:50 AM [DEBUG] IntegritySCM - IntegrityItemAction.IntegrityItemDescriptorImpl.isApplicable executed!
May 24, 2012 10:23:51 AM [DEBUG] IntegritySCM - api ping --user=build_2050 --port=7001 --hostname=MKS-4 – returned exit code 0
May 24, 2012 10:23:51 AM [DEBUG] IntegritySCM - Successfully established connection build_2050@MKS-4:7001
May 24, 2012 10:23:51 AM [DEBUG] IntegritySCM - Preparing to execute si projectinfo for #p=p:/PROJEKTE/MPA/MPA.pj#s=PC_SW/pc_sw.pj#
May 24, 2012 10:23:51 AM [DEBUG] IntegritySCM - si projectinfo --user=build_2050 --port=7001 --hostname=MKS-4 --project=#p=p:/PROJEKTE/MPA/MPA.pj#s=PC_SW/pc_sw.pj# – returned exit code 0
May 24, 2012 10:23:51 AM [DEBUG] IntegritySCM - si projectinfo --user=build_2050 --port=7001 --hostname=MKS-4 --project=#p=p:/PROJEKTE/MPA/MPA.pj#s=PC_SW/pc_sw.pj# – returned 0
May 24, 2012 10:23:51 AM [DEBUG] IntegritySCM - Preparing to execute si viewproject for #p=p:/PROJEKTE/MPA/MPA.pj#s=PC_SW/pc_sw.pj
May 24, 2012 10:23:52 AM [DEBUG] IntegritySCM - Executed si viewproject --user=build_2050 --port=7001 --hostname=MKS-4 --recurse --project=#p=p:/PROJEKTE/MPA/MPA.pj#s=PC_SW/pc_sw.pj --fields=name,context,cpid,memberrev,membertimestamp,memberdescription – with interim
May 24, 2012 10:23:52 AM [DEBUG] IntegritySCM - Attempting to open connection to database: C:\Jenkins\jobs\MKS Test\builds\2012-05-24_10-23-50\IntegritySCM
May 24, 2012 10:23:53 AM [DEBUG] IntegritySCM - Schema 'DBUSER' does not exist
May 24, 2012 10:23:53 AM [DEBUG] IntegritySCM - Integrity SCM cache tables do not exist, creating...
May 24, 2012 10:23:53 AM [DEBUG] IntegritySCM - New Integrity SCM cache tables successfully created!
May 24, 2012 10:23:53 AM [DEBUG] IntegritySCM - Attempting to execute query INSERT INTO CM_PROJECT (TYPE, NAME, MEMBER_ID, TIMESTAMP, DESCRIPTION, CONFIG_PATH, REVISION, RELATIVEFILE) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
May 24, 2012 10:24:13 AM [INFO] IntegritySCM - API Exception caught...
May 24, 2012 10:24:14 AM [DEBUG] IntegritySCM - Attempting to shut down database: C:\Jenkins\jobs\MKS Test\builds\2012-05-24_10-23-50\IntegritySCM
May 24, 2012 10:24:14 AM [INFO] IntegritySCM - Failed to shutdown database connection!
May 24, 2012 10:24:14 AM [INFO] IntegritySCM - Database 'C:/Jenkins/jobs/MKS Test/builds/2012-05-24_10-23-50/IntegritySCM' shutdown.
May 24, 2012 10:24:14 AM [INFO] IntegritySCM - java.sql.SQLNonTransientConnectionException: Database 'C:/Jenkins/jobs/MKS Test/builds/2012-05-24_10-23-50/IntegritySCM' shutdown.
May 24, 2012 10:24:14 AM [DEBUG] IntegritySCM - Successfully disconnected connection build_2050@MKS-4:7001

>>> However, if I try this with a sub-subproject (3K files) it seems to work:

Started by user anonymous
Building in workspace C:\Jenkins\jobs\MKS Test\workspace
Change Log: http://pc11065:8080/job/MKS%20Test/16/changes
Build Log: http://pc11065:8080/job/MKS%20Test/16/console
Preparing to execute si projectinfo for #p=p:/PROJEKTE/MPA/PC_SW/pc_sw.pj#s=SRC/src.pj
Preparing to execute si viewproject for #p=p:/PROJEKTE/MPA/PC_SW/pc_sw.pj#s=SRC/src.pj
Checkout directory is C:\Jenkins\jobs\MKS Test\workspace
A clean copy is requested; deleting contents of C:\Jenkins\jobs\MKS Test\workspace
Populating clean workspace...
Successfully checked out 2175 files!
Saving current Integrity Project configuration...
Writing build change log...
Change log successfully generated: C:\Jenkins\jobs\MKS Test\builds\2012-05-23_19-28-14\changelog.xml
Finished: SUCCESS

>>> I have also updated mksapi.jar to the one I have in my client, plus executed the mksapiviewer: c:\Jenkins\jobs>mksapiviewer --xml --iplocal si viewproject -R --project=#p=p:/PROJEKTE/MPA/PC_SW/pc_sw.pj# --fields=name,context > mksview.log

I get a 9MB file with a fine looking xml structure, with a bunch of WorkItems:

<?xml version="1.0"?>
<Response command="viewproject" app="si" version="4.10.0 7-1 9665">
<App-Connection port="7001" userID="build_2050" server="MKS-4"></App-Connection>
<WorkItems selectionType="ICurrentOrFormerProjectTypeElementSelection">
<WorkItem id="#p=p:/PROJEKTE/MPA/PC_SW/pc_sw.pj#boost" parentID="#p=p:/PROJEKTE/MPA/PC_SW/pc_sw.pj" displayId="p:/PROJEKTE/MPA/PC_SW/boost/project.pj" modelType="si.Subproject">
<Field name="name">
<Value dataType="string">p:/PROJEKTE/MPA/PC_SW/boost/project.pj</Value>
</Field>
<Field name="parent">
<Value dataType="string">p:/PROJEKTE/MPA/PC_SW/pc_sw.pj</Value>
</Field>
<Field name="type">
<Value dataType="string">shared-build-subproject</Value>
</Field>
<Field name="memberrev">
<Item id="1.1.1.31" displayId="1.1.1.31" modelType="si.Revision">
</Item>
</Field>
</WorkItem>
<WorkItem .........................................

Please help out Thanks!