keith-turner opened a new issue #538: Stateful compaction checking in write ahead log recovery is incorrect URL: https://github.com/apache/accumulo/issues/538 When a tablet server dies, all of the tablets it was serving are assigned its active WALs. See #537 for a more detailed description. Therefore its possible that a clean tablet (had no data in memory when tserver died) is assigned WALs for recovery. Its also possible that the clean tablet only has a compaction finish even in the WAL. However there is checking in the recovery code that checks for only a compaction finish event and flags it as an error. This is not an error. This check made sense before 1.8.0 when WALs were tracked per tablet, because in this case a lone compaction finish event should not happen. After 1.8.0, this check needs to be reconsidered. Discovered this issue as a result of looking into and discussing #535 with @ctubbsii.
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