Hi, In our five node cluster running the same software version on all machines, two of them have started to emit assertion failure messages: Feb 26 13:54:47 web0 kernel: GFS: fsid=kfki:services.4: warning: assertion "gfs_glock_is_locked_by_me(ip->i_gl)" failed Feb 26 13:54:47 web0 kernel: GFS: fsid=kfki:services.4: function = gfs_readpage Feb 26 13:54:47 web0 kernel: GFS: fsid=kfki:services.4: file = /services/src/2.6.23.16/cluster-2.01.00/gfs-kernel/src/gfs/ops_address.c, line = 279 Feb 26 13:54:47 web0 kernel: GFS: fsid=kfki:services.4: time = 1204030487 One of the machines in question has been rebooted today, the other one has been running for several days. How could I debug what is the reason of the problem? Best regards, Jozsef -- E-mail : kadlec@xxxxxxxxxxxx, kadlec@xxxxxxxxxxxxxxxxx PGP key: http://www.kfki.hu/~kadlec/pgp_public_key.txt Address: KFKI Research Institute for Particle and Nuclear Physics H-1525 Budapest 114, POB. 49, Hungary -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster