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Difference between revisions of "Middleware issues and solutions"

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GGUS ticket [[ #80622]]
GGUS ticket [[ #80622]]

= Storage Element =
= Storage Element =

Revision as of 13:19, 28 March 2012

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Purpose of this page is to document recurring middleware issues with broad impact and the respective solutions and/or workarounds.

This page is maintained by the Distributed Middleware Support Unit of EGI.


BDII: make size of tmpfs for /var/run/bdii/db configurable

Under certain conditions, an EMI top-bdii can hang when updating the information: It turned out that the current default size for /var/run/bdii/db, 1500 Mb, isn't enough to hold the current BDII database and LDIF files/other stuff for update. A workaround could be increas the tmpfs size to 2.4G, for example. See details in GGUS ticket [79393]


CREAM refuses Terena-signed VOMS proxies

TERENA eScience SSL CA sets pathlen attribute among its basic constraints (see

This triggers a bug in VOMS java API (the API incorrectly applies the policy on checking the chain of the attribute certificate), which is used by CREAM, resulting in errors on job submission:

   FATAL - User  <user's DN> not authorized for operation {}getProxyReq

A workaround is not using TERENA eScience SSL CA signed certificates as host certificates of VOMS servers.

The problem is fixed in voms-api-java-2.0.5, released in EMI. A backport to gLite 3.2 is unofficially available with unreleased patch [#4997] (no gLite 3.2 update is expected).

GGUS ticket [#76129]

/tmp fills up with x509up*glexec files

Nov 27, 2011

CREAM CE uses glexec to gain the right local user identity for the job. As a sideeffect, a matching x509 proxy file is created in /tmp. The result is filling /tmp up with these files.

Starting from EMI-1 CREAM release, which uses glexec-0.8, the problem is avoided by the setting

  create_target_proxy = no

in the glexec.conf file.

In gLite CREAM releases it is worked around by putting

 <parameter name="glexec_probe_cmd" value="/opt/glite/bin/glexecprobe" />
 <parameter name="methods" value="JobRegister, putProxy" />

into the section

 <authzchain name="chain-1">
   <plugin name="localuserpip"

of /opt/glite/etc/glite-ce-cream/cream-config.xml. This is done automatically by YAIM but not by Quattor.

GGUS ticket [[1]]


VOMS server fails with high number of VOs

VOMS server of gLite 3.2 is more memory greedy, it starts failing when configured to serve more than 10 (approx.) VOs.

Change -XX:MaxPermSize parameter of CATALINA_OPTS to the value of at least 512m in /etc/tomcat5/tomcat5.conf

 CATALINA_OPTS="-Xmx1508M -server -XX:MaxPermSize=512m"

and add

 * soft nofile 2048
 * hard nofile 2048

into /etc/security/limits.conf.

GGUS ticket #72136

NOTE (2012-02-29): in the EMI VOMS, the value of -XX:MaxPermSize is automatically set by yaim basing on the VO numbers enabled on the server

WMS and LB

Job submission breaks when VOMS server certificate is renewed

When VOMS server certificate is renewed, retaining the same DN, and both old and new certificates of this VOMS server are left in /etc/grid-security/vomsdir on the WMS machine, a Gridsite bug is exposed and jobs get refused with ambiguous error

   Unable to delegate the credential to the endpoint:

Other symptoms are messages "Remote GRST CRED: Not Available" in wmproxy.log.

The workaround is manually removing the old VOMS server certificate from /etc/grid-security/vomsdir (it's not used either).

GGUS ticket [#77256]

LB breaks when MySQL 5.1 is installed

Both LB and WMS nodes are affected by this problem.

Due to imperfect packaging of LB, all RPM dependencies are satisfied by installing MySQL 5.1 first and then LB and/or WMS. This happens quite easily because the EGI SAM repository provides MySQL 5.1.

LB dies silently shortly after startup because of missing shared library (no glite-lb-bkserverd processes run), WMS does not accept jobs, logging

   (edg_wll_RegisterJobMaster(): unable to register job
   Resource temporarily unavailable;; Logging library ERROR:
   Resource temporarily unavailable;; edg_wll_DoLogEventServer():
   edg_wll_log_proxy_connect error
   Connection refused;; edg_wll_log_proxy_connect())

into /var/log/wms/wmproxy.log.

The workaround is installing MySQL-shared-compat package.

GGUS ticket [#79624].

changing WMS hostname

If you have to change the WMS hostname without reinstalling the service, the old hostname would continue to appear into some paths, so after changing the network configuration, do also the following steps:

  • uninstall condor (emi-wms will get uninstalled because of the dependancies)
  • remove the dir /opt/condor*
  • reinstall emi-wms

GGUS ticket [#80622]

Storage Element

BDII does not start at SE node

BDII daemon does not start correctly at SE node, yielding the service not to be published to GOC, etc. Symptoms are error messages:

  # service ldap restart
  Stopping slapd: [ OK ]
  Checking configuration files for slapd: bdb_db_open: Warning - No
  DB_CONFIG file found in directory /var/lib/ldap: (2)
  Expect poor performance for suffix dc=my-domain,dc=com.
  config file testing succeeded
  [ OK ]
  Starting slapd: [ OK ]

The problem is caused by settting the BDII_USER variable in site-info.def, which causes incorrect permission settings on some files slapd uses. This variable should not be set at SE nodes, it's intended for BDII node only.

GGUS ticket [#73086]


Lack of support for PKCS#8

Globus does not suporrt PKCS#8 format of private keys. Hovever, this is the default for OpenSSL 1.x. Therefore, key-certificate pairs generated by OpenSSL 1.x in the default way are not directly usable with services based on Globus (many former gLite ones), yielding errors like

   globus_gsi_gssapi: Unable to read credential for import
   globus_gsi_gssapi: Error with GSI credential
   globus_credential: Error reading proxy credential: Unhandled PEM sequence: PRIVATE KEY

The problem can be worked around by converting the PKCS#8 key to RSA

   openssl pkcs8 -in key.pk8 -out key-temp.pem
   openssl rsa -in key-temp.pem -out key.pem
   rm key-temp.pem

GGUS ticket [#77148]