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How to fix the following issue and what's the problem. Due to this problem, everything that uses python is not working.

/lib/librt.so.1: symbol pthread_barrier_wait, version GLIBC_2.2 not defined in file libpthread.so.0 with link time reference

Please install a package which provides this module, or verify that the module is installed correctly.

It's possible that the above module doesn't match the current version of Python, which is: 2.6.2 (r262:71600, Aug 21 2009, 12:22:21) [GCC 4.4.1 20090818 (Red Hat 4.4.1-6)]

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The problem is with grub2 installation. System reboot solved the problem.

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