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Posted to notifications@accumulo.apache.org by GitBox <gi...@apache.org> on 2022/05/16 14:37:12 UTC

[GitHub] [accumulo] milleruntime commented on pull request #2708: Disable Merging MINC by default

milleruntime commented on PR #2708:
URL: https://github.com/apache/accumulo/pull/2708#issuecomment-1127758501

   Here is the situation where a Tablet couldn't flush... The tserver hosting the hot spot Tablet was hitting its max WAL limit (TABLE_MINC_LOGS_MAX) so it was forcing a flush on the Tablet.  The client `TabletServerBatchWriter` would try to flush its data by calling `applyUpdates()` to the current commit session but the user is seeing the `HoldTimeoutException` on the client side. The flush will timeout on the tserver, presumably due to hitting max number of write threads and/or connection pools filling up. The WALs keep growing due to the Tablet not flushing. Major compactions will complete but the hot spot Tablet will get stuck trying to flush.
   


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