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---+!! Known issues %TOC% ---++ Open 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 released in EMI) ---+++ Problem with generic dynamic scheduler with SGE The yaim plugin for sge configures the gip for publishing information but when used out of the box the following error is shown in the BDII log: <verbatim> Traceback (most recent call last): File "/usr/libexec/lcg-info-dynamic-scheduler", line 256, in ? import lrms ImportError: No module named lrms </verbatim> The workaround is defining =PYTHONPATH= in =/var/lib/bdii/gip/plugin/glite-info-dynamic-scheduler-wrapper=: <verbatim> $ cat /var/lib/bdii/gip/plugin/glite-info-dynamic-scheduler-wrapper #!/bin/sh #/opt/lcg/libexec/lcg-info-dynamic-scheduler -c /opt/glite/etc/lcg-info-dynamic-scheduler.conf export PYTHONPATH=/usr/lib/python:$PYTHONPATH /usr/libexec/lcg-info-dynamic-scheduler -c /etc/lcg-info-dynamic-scheduler.conf </verbatim> Relevant ticket: https://ggus.eu/ws/ticket_info.php?ticket=76961 ---+++ Issue with the setting of the maximum number of accepted FTP connections The number of maximum number of gridftp connections is now automatically set in =/etc/grid-security/gridftp.conf=. It should be manually added also in the file =/etc/gridftp.conf= where the line: <verbatim> connections_max 150 </verbatim> should be added. Relevant ticket: https://ggus.eu/tech/ticket_show.php?ticket=78902 ---+++ Significant changes introduced with Torque 2.5.7-1 The updated EPEL5 build of torque-2.5.7-1 as compared to previous versions enables munge[1] as an inter node authentication method. Please see [[http://www.eu-emi.eu/kebnekaise-products/-/asset_publisher/4BKc/content/cream-torque-module#Release_Notes][here]] ---+++ pbs_server create hangs on first time run On a fresh installation of torque-server, running pbs_server for the first time by running =/etc/init.d/pbs_server start will hang=. Also, the command to create a server database file hangs (=/etc/init.d/pbs_server create=). Issue tracked at https://bugzilla.redhat.com/show_bug.cgi?id=744138. ---+++ Problems with suspend when the old blparser is used When the old blparser is used, there are problems with the suspend command. Relevant bug: https://savannah.cern.ch/bugs/?90085 ---+++ Problems running single yaim functions in EMI-2 When configuring a EMI-2 CREAM-CE with yaim, there might be problems if a single function is run (the problem is that the =TOMCAT_VERSION_ variable is not defined). The problem involves the following functions: * =config_cream_ce= * =config_cream_cemon= * =config_cream_emies= * =config_cream_gliteservices= * =config_cream_stop= There aren't problems if instead the whole CREAM-CE is configured (i.e. =yaim -c -s site-info.def -n creamCE ...=). ---+++ Problems re-enabling CEMon and/or EMI-ES When configuring a EMI-2 CREAM-CE, by default CEMon and EMI-ES are not deployed, unless the relevant yaim variables =USE_CEMON= and =USE_EMIES= are set to =true=. There are problems if CEMon is disabled (i.e. with =USE_CEMON= not set or set to =false=) and then a reconfiguration is done re-enabling it (i.e setting =USE_CEMON= to =true=). The workaround is to reinstalling the =glite-ce-monitor= rpm before reconfiguring. There is the same issue for EMI-ES. ---+++ 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 ---++ Old known issues Problems in CREAM software or in other software modules affecting a CREAM based CE that have already been fixed (i.e. they are not affecting the latest release of the software released in EMI) ---+++ Memory leak in bupdater for PBS and LSF Version 1.16.3 of BLAH is affected by a quite critical memory leak in the bupdater component for LSF and PBS. Because of that the usage of memory of the bupdater process will keep increasing till when it crashes/it is killed by OOM. It is then automatically restarted by blah. SGE is not affected by this problem For LSF and PBS, the workaround is to configure the blparser using the old method (see: http://wiki.italiangrid.it/twiki/bin/view/CREAM/SystemAdministratorGuideForEMI1#1_2_4_Choose_the_BLAH_BLparser_d) or to the restart from time to time the bupdater. Relevant bug: https://savannah.cern.ch/bugs/index.php?89859 Fix provided with EMI-1 Update 12 ---+++ Problems starting the bupdater and bnotifier with (S)GE With SGE, there is a problem when starting the bupdater and bnotifier: <verbatim> Starting BNotifier: /usr/bin/BNotifier: sge_helperpath not defined. Exiting [FAILED] Starting BUpdaterSGE: /usr/bin/BUpdaterSGE: sge_helperpath not defined. Exiting [FAILED] </verbatim> The workaround is to uncomment the variable: <verbatim> sge_helperpath=/usr/bin/sge_helper </verbatim> in the =blah.config= file. See https://savannah.cern.ch/bugs/index.php?88974 and https://ggus.eu/ws/ticket_info.php?ticket=76067 Fix provided with EMI-1 Update 12 ---+++ No dynamic info published for one VOview For one VOView the =lcg-info-dynamic-scheduler= doesn't publish information, and therefore the values defined in the static ldif file is used. As found by Jan Astalos (thanks !) this is because a missing blank line at the end of =/var/lib/bdii/gip/ldif/static-file-CE.ldif= created by YAIM. Waiting for the fix, the workaround is simply doing: <verbatim> echo >> /var/lib/bdii/gip/ldif/static-file-CE.ldif </verbatim> after having configured via yaim Relevant bug: http://savannah.cern.ch/bugs/?86191 Fix provided with CREAM CE 1.13.3 (see http://savannah.cern.ch/task/?24022) released with EMI-1 Update 10 ---+++ Problems if Torque is not configured to suppress mails Torque should be configured to suppress all mails (mail_domain=never). Otherwise the bupdater process of the blparser will keep dying. Relevant bug: https://savannah.cern.ch/bugs/index.php?86238 Fix provided with BLAH 1.16.3 (see http://savannah.cern.ch/task/?22845) released with EMI-1 Update 10 ---+++ Memory issues with new BLAH Blparser If the new Blparser is used (click [[http://wiki.italiangrid.org/twiki/bin/view/CREAM/SystemAdministratorGuideForEMI1#2_15_How_to_check_if_you_are_usi][here]] to check this) there can be issues if the blah registry becomes very large. The submission process can get slower and there can be problems with memory usage. Waiting for the fix, there are two possible workarounds: * Reduce the number of multiple instances of blahpd (the default value is 50). This means changing the value =cream_concurrency_level= in =cream-config.xml=. To apply the change, you will then need to restart tomcat. This should help addressing the issue, but it will also mean less parallel instances interacting with the batch system (and so a possible reduction of the throughput in the submission to the batch system) . Click [[http://wiki.italiangrid.org/twiki/bin/view/CREAM/SystemAdministratorGuideForEMI1#1_4_7_1_Tune_the_number_of_concu][here]] to get more details * Reduce the value for =purge_interval= in =blah.config=. This value is expressed in seconds. A job is removed from the BLAH registry (and therefore not managed anymore by BLAH and therefore CREAM) after =purge_interval= seconds since its submission. To apply the change, you will then need to restart the blparser (=/etc/init.d/glite-ce-blahparser restart=) Relevant bug: https://savannah.cern.ch/bugs/index.php?75854 Fix provided with BLAH 1.16.3 (see http://savannah.cern.ch/task/?22845) released with EMI-1 Update 10 ---+++ Problems with Torque 2.5.7-1 There is a problem with latest torque version available in the EPEL repository (2.5.7-1). At start the following error is reported: <verbatim> [root@cream-38 ~]# /etc/init.d/pbs_server start /var/torque/server_priv/serverdb Starting TORQUE Server: PBS_Server: LOG_ERROR::No such file or directory (2) in pbs_init, unable to stat checkpoint directory /var/torque/checkpoint/, errno 2 (No such file or directory) PBS_Server: LOG_ERROR::PBS_Server, pbsd_init failed [FAILED] </verbatim> Problem addressed with Torque v- 2.5.7-2 ---+++ Problems affecting users with certificates signed by the GermanGrid Because of a bug in trustmanager, users with certificates signed by the GermanGrid CA can't submit jobs to CREAM. The error message is something like: <verbatim> Failed to create a delegation id for job https://grid-lb0.desy.de:9000/ADkeOt6tc0Rfi8oP-pzUrQ: reason is Client 'O=GermanGrid,OU=DESY,CN=Alexander Fomenko' is not issuer of proxy 'O=GermanGrid,OU=DESY,CN=Alexander Fomenko,CN=proxy,CN=proxy'. </verbatim> * Relevant bug: https://savannah.cern.ch/bugs/?83426 * Fix released with CREAM CE 1.13.2 (http://savannah.cern.ch/task/?21573), released with EMI-1 Update 4 ---+++ Problems with SubCAs when Argus is used as authorization system There are problems when CREAM CE is configured to use Argus, happening with sub-CAs (e.g. CERN-TCA, UKeScienceCA) * Relevant bug: https://savannah.cern.ch/bugs/?82567 * Fix released with CREAM CE 1.13.1 (http://savannah.cern.ch/task/?20813) -- Main.MassimoSgaravatto - 2011-05-05
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Topic revision: r22 - 2012-05-02
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MassimoSgaravatto
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