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CONTAP-596583: System Restart During Concurrent Storage Operations

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Issue

A system can restart when a directory is being processed concurrently by background storage checks and other operations. The issue occurs if the directory’s processing status is recorded inconsistently and the directory is later reloaded.
The system may display this message:
PANIC: assertion "WAFL_WIP_IFLAG_ON(wip, WAFL_IFLAG_IRONED)" failed: file "prod/common/wafl/iron/distributed.c", line 219

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