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---+!! Known issues Known problems in CREAM software or in other software modules affecting a CREAM based CE (the list refer to known problem affecting the latest release of the software in production) %TOC% ---++ Condor and SGE support Condor and SGE are not yet fully supported as batch system for CREAM. ---++ Execution of DAG jobs Execution of DAG jobs on the CREAM based CE through the gLite WMS is not implemented yet. ---++ qsub crashes With some Torque versions it was observer qsub crashing with glibc detecting a double free or corruption.Although this is a problem to be addressed in Torque problem, adding: <verbatim> export MALLOC_CHECK_=0 </verbatim> to =/etc/blah.config= should help ---++ CREAM CE not Torque master: communication errors when the maui server and client are not of the same builds. * [[https://savannah.cern.ch/bugs/?61968][Bug #61698]]: when the CREAM CE is not a Torque server, there could be communication errors when the maui (and probably torque) server and client are NOT of the same builds. A common scenario/example when this can happen: * The maui server is a 32bit binary deployed on a 32bit LCG-CE * The 64bit maui client is deployed on a 64bit CREAM-CE From the CREAM-CE node perform: <verbatim> [root@cream-ce]# diagnose –g </verbatim> If you see: <verbatim> ERROR: lost connection to server ERROR: cannot request service (status) </verbatim> you are affected by the problem. A possible workaround is the following: On the LCG-CE create a cron file to dump the =diagnose -g= output to a file: <verbatim> [root@lcg-ce]# cat <<EOF>> /etc/cron.d/diagnose-for-cream */5 * * * * root /usr/bin/diagnose –g > /export/dir/to/cream-ce/diagnose.out EOF </verbatim> The interval defined in =/etc/cron.d/diagnose-for-cream file=, has to be set by the experts. Just an example has been provided here. Then export over NFS the directory where the file is located: <verbatim> [root@lcg-ce]# cat /etc/exports /export/dir/to/cream-ce cream-ce(rw,map_identity,no_root_squash,sync) </verbatim> On the CREAM-CE include/mount the remote directory to a local one: <verbatim> [root@cream-ce]# cat /etc/fstab | grep diagnose lcg-ce: /export/dir/to/cream-ce /import/dir/to/cream-ce nfs defaults,bg 0 0 </verbatim> Then feed the =lcg-info-dynamic-scheduler= with the diagnose output file: <verbatim> [root@cream-ce]# cat /opt/glite/etc/lcg-info-dynamic-scheduler.conf|grep vomaxjobs-maui vo_max_jobs_cmd: /opt/lcg/libexec/vomaxjobs-maui -h lcg-ce –infile /import/dir/to/cream-ce/diagnose-for-cream </verbatim> ---++ Reconfiguration after update After an update of the CREAM RPM, it is mandatory to reconfigure (via yaim) ---++ Special characters in CREAM_DB_USER and CREAM_DB_PASSWORD Don't use special characters in the CREAM_DB_USER and CREAM_DB_PASSWORD yaim variables ---++ Problems with OS language different than US English Problems have been reported if jobs are submitted through the WMS to a CREAM CE deployed on a machine installed using a non-English language. This is because of different representations of decimal numbers. The workaround in this case is to uncomment the line: <verbatim> LANG=en_US </verbatim> in =$CATALINA_HOME/conf/tomcat5.conf= and then restart tomcat -- Main.MassimoSgaravatto - 2011-05-05
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Topic revision: r2 - 2011-05-17
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MassimoSgaravatto
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