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CONTAP-595534: Unexpected reboot: WAFL hung for aggrxxx.in SK process wafl_exemptxx on release 9.15.1P7

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Issue

A rare issue has been identified where a storage controller may experience a system unexpected reboot and become unresponsive. This happens when the WAFL file system's inode cleaning process  gets stuck for an extended period (over 10 minutes). When this occurs, the system cannot complete its consistency operations, which can lead to blocked data writes and temporary loss of data access.

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