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Posted to notifications@accumulo.apache.org by "keith-turner (via GitHub)" <gi...@apache.org> on 2023/04/20 12:37:56 UTC
[GitHub] [accumulo] keith-turner opened a new issue, #3323: BatchScanner performs excessive metadata queries when tablet have no location
keith-turner opened a new issue, #3323:
URL: https://github.com/apache/accumulo/issues/3323
**Describe the bug**
When using a BatchScanner and tablets have no location, the metadata table will be [queried every 100ms](https://github.com/apache/accumulo/blob/856e361a83560289548fa399db02e0be374a1f9b/core/src/main/java/org/apache/accumulo/core/clientImpl/TabletServerBatchReaderIterator.java#L279) to look for locations. If lots of client processes are doing this it can place unnecessary strain on the metadata table. This code should use the internal Accumulo [Retry](https://github.com/apache/accumulo/blob/main/core/src/main/java/org/apache/accumulo/core/util/Retry.java) class which offers exponential backoff. The Retry object also offer some nice logging features.
**Expected behavior**
Excessive, metadata queries are avoided.
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[GitHub] [accumulo] dlmarion closed issue #3323: BatchScanner performs excessive metadata queries when tablets have no location
Posted by "dlmarion (via GitHub)" <gi...@apache.org>.
dlmarion closed issue #3323: BatchScanner performs excessive metadata queries when tablets have no location
URL: https://github.com/apache/accumulo/issues/3323
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