NERSCPowering Scientific Discovery Since 1974

Open Issues

If you can not login to Edison while you can login to Hopper

July 21, 2015 | 0 Comments

Some users, who use a later version of OpenSSL, eg., 6.9, may expereince login problems to Edison. This is because the default cipher from the later version of OpenSSL are not accepcted by Edison. This problem is being worked on, and a fix is expected to be in place by the end of August. Until then, please provide a different cipher on the ssh command line (using the -c option) to login to Edison. For example,
ssh -c aes256-ctr edison.nersc.gov -l <your username>

0 comments | Read the full post

cray-hdf5-parallel/1.8.13 garbling integers in intel environment

September 11, 2014 | 0 Comments

This problem was fixed on 11/11/14 on Edison with CDT 1.20 upgrade (Novemeber PE release).

0 comments | Read the full post

The cce/8.3.0 C++ compiler may run into a linking error on Edison

July 1, 2014 | 0 Comments

You may run into the following linking error with C++ codes using cce/8.3.0, the default Cray compiler, on Edison.

0 comments | Read the full post

If your codes hang or run much slower after the maintenance on 6/25/14

June 27, 2014 | 0 Comments

During the maintenance on 6/25/14, Edison was upgraded to Cray Linux Environment (CLE) 5.2UP01 and Cray Message Passing Toolkits 7.0.0 which require all MPI codes to be recompiled. As a result, some users may see their codes hang or run much slower than before after recompilation. We believe this is due to some regression introduced in the new CLE version, and have filed a bug with Cray. If you find your codes run much slower than before,  please use one of the two workarounds below until Cray provides a permanent fix.

0 comments | Read the full post

Recompile if your codes run into MPICH error after the maintenance on 6/25/2014

June 27, 2014 | 0 Comments

During the maintenance on 6/25, we upgraded Edison CLE to 5.2UP01 and also set the CDT 1.16 to default. As a result all MPI codes are required to recompile. If your job run into the following MPICH error, then please recompile, that will fix the problem.

0 comments | Read the full post