Hi all, what are the possible origins of messages of the type hung, or it might only be slow and will resume later. Dumping the stack trace for debugging purposes: system was overloaded (too many service threads, or there were not enough hardware resources). Apart from taking the enormous 0.00sec, these threads were running on an unused test system, Lustre v 1.8.9_intel. And at the given time, it was isolated in its own IB-subnet, all other traffic was cut because of a general failure of the surrounding network ;-) Each of these messages is accompanied by a trace. I'm quite accustomed to seeing such messages, but then they appear on the heavily used production system, the times given are ~ 1000s, and the overload of the respective box is quite visible, too. But here? Regards, Thomas -- -------------------------------------------------------------------- Thomas Roth Department: Informationstechnologie Location: SB3 1.262 Phone: +49-6159-71 1453 Fax: +49-6159-71 2986 GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 1 64291 Darmstadt www.gsi.de Gesellschaft mit beschränkter Haftung Sitz der Gesellschaft: Darmstadt Handelsregister: Amtsgericht Darmstadt, HRB 1528 Geschäftsführung: Professor Dr. Dr. h.c. Horst Stöcker, Peter Hassenbach Vorsitzende des Aufsichtsrates: Dr. Beatrix Vierkorn-Rudolph Stellvertreter: Ministerialdirigent Dr. Rolf Bernhardt