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. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
