I have created a small reproducer program (81 lines of code) that results in a process that appears to hang in the kernel, accumulating cpu time.  The process is unresponsive to kill commands.  From gdb backtrace, it appears the call is stuck somewhere in fsetxattr() which is called by llapi_layout_file_open().  The problem happens only when a non-existent ost is added to the layout with a call to llapi_layout_ost_index_set().  The call to llapi_layout_sanity(), just before calling llapi_layout_file_open(), returns 0.  Is this a known issue?

Thanks, John
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