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Posted to notifications@accumulo.apache.org by GitBox <gi...@apache.org> on 2021/06/24 16:05:57 UTC

[GitHub] [accumulo] milleruntime commented on issue #2179: Handle old sorted map files

milleruntime commented on issue #2179:
URL: https://github.com/apache/accumulo/issues/2179#issuecomment-867763969


   I tested an upgrade in Uno with some data and sorted WAL files. I was surprised to not see any errors trying to recover the old map files. I noticed that the GC deleted the files rather quickly after the Upgrader was finished.
   
   <pre>
   11:49:32 {main} ~/workspace/uno/install/logs/accumulo$ grep 980ce402-07dc-4a09-b6ac-e26664db29a3 *
   gc_ip-10-113-12-25.log:2021-06-24T11:08:05,957 [gc.GarbageCollectWriteAheadLogs] DEBUG: Removing CLOSED WAL hdfs://localhost:8020/accumulo/wal/ip-10-113-12-25+9997/980ce402-07dc-4a09-b6ac-e26664db29a3
   gc_ip-10-113-12-25.log:2021-06-24T11:08:05,965 [gc.GarbageCollectWriteAheadLogs] DEBUG: Removing recovery log hdfs://localhost:8020/accumulo/recovery/980ce402-07dc-4a09-b6ac-e26664db29a3
   gc_ip-10-113-12-25.log:2021-06-24T11:08:05,979 [log.WalStateManager] DEBUG: Removing 980ce402-07dc-4a09-b6ac-e26664db29a3
   </pre>
   
   I am going to try the test again but use CI to make sure there wasn't data any data loss.


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