This note gives a brief overview of bug 10361651.The content was last updated on: 10-NOV-2011
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Product (Component) Oracle Server (Rdbms) Range of versions believed to be affected Versions BELOW 12.1 Versions confirmed as being affected Platforms affected Generic (all / most platforms affected)
This issue is fixed in
An Oracle process may hang indefinitely when trying to open a file on dNFS if dNFS is unresponsive for some reason when it should really timeout after a while and report an error that the file cannot be opened. The problem is that a timeout counter may wrap and so the open operation may never time out when it should. Rediscovery Notes: The session shows as waiting for "Disk file operations I/O". The call stack shows kgodm_identify near the top and may include kgodm_getnfscdata above this on some platforms. eg: A typical substack might be: __nanosleep <- kgodm_identify <- odm_identify <- ksfdopn1 <- ksfdopn The session is using some small CPU as it repeatedly sleeps in a loop for very short intervals. Workaround Address the underlying dNFS issue. Kill the stuck process.