Installation/Compilation problems

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Installation Problems

SSL certificate errors

At some sites you might get a SSL server certificate error during the git clone operation, like

error: SSL certificate problem, verify that the CA cert is OK. Details:

This indicates that you don't have the proper certificate authority (CA) files installed on your computer. Possible solutions:

  • The easiest way out is to tell git to ignore the SSL verification with
 git config --global http.sslVerify false
  • Set the environment variable GIT_SSL_NO_VERIFY=true.
  • But the best is to just actually install the correct certificate authority files.

Usage Problems

How to recover from a corrupted ODB

  • Stop your front-ends, mlogger, mhttpd, etc.
  • Remove the shared memory associated to ODB buffer. Find the shared memory segment by doing
ls -l /dev/shm

then remove the segment that will be something like /dev/shm/*_test_ODB_SHM

  • Move the old ODB
cd online
  • Restart ODB with larger size
odbedit -s 10000000
  • Reload the last saved ODB dump you have. These dumps are typically called something like 'online/history/*.xml'.

So from odbedit you do something like

odbedit> load history/run00071.xml
  • OK, now your ODB should be fixed.