HDDS-4453. Replicate closed container from random selected datanode#1574
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nandakumar131 merged 1 commit intoapache:masterfrom Nov 13, 2020
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HDDS-4453. Replicate closed container from random selected datanode#1574nandakumar131 merged 1 commit intoapache:masterfrom
nandakumar131 merged 1 commit intoapache:masterfrom
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sodonnel
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Thanks for working on this. The changes LGTM. +1.
nandakumar131
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* master: (53 commits) HDDS-4458. Fix Max Transaction ID value in OM. (apache#1585) HDDS-4442. Disable the location information of audit logger to reduce overhead (apache#1567) HDDS-4441. Add metrics for ACL related operations.(Addendum for HA). (apache#1584) HDDS-4081. Create ZH translation of StorageContainerManager.md in doc. (apache#1558) HDDS-4080. Create ZH translation of OzoneManager.md in doc. (apache#1541) HDDS-4079. Create ZH translation of Containers.md in doc. (apache#1539) HDDS-4184. Add Features menu for Chinese document. (apache#1547) HDDS-4235. Ozone client FS path validation is not present in OFS. (apache#1582) HDDS-4338. Fix the issue that SCM web UI banner shows "HDFS SCM". (apache#1583) HDDS-4337. Implement RocksDB options cache for new datanode DB utilities. (apache#1544) HDDS-4083. Create ZH translation of Recon.md in doc (apache#1575) HDDS-4453. Replicate closed container for random selected datanodes. (apache#1574) HDDS-4408: terminate Datanode when Datanode State Machine Thread got uncaught exception. (apache#1533) HDDS-4443. Recon: Using Mysql database throws exception and fails startup (apache#1570) HDDS-4315. Use Epoch to generate unique ObjectIDs (apache#1480) HDDS-4455. Fix typo in README.md doc (apache#1578) HDDS-4441. Add metrics for ACL related operations. (apache#1571) HDDS-4437. Avoid unnecessary builder conversion in setting volume Quota/Owner request (apache#1564) HDDS-4417. Simplify Ozone client code with configuration object (apache#1542) HDDS-4363. Add metric to track the number of RocksDB open/close operations. (apache#1530) ...
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What changes were proposed in this pull request?
Che-Wei Chang reported a very particular case related to the data replication:
When a container is downloaded successfully but the content is invalid, the error the retry mechanism doesn't work very well. Downloader reports the download successful therefore it won't be reported as failure, but import will fail again and again.
To make it more resilient we can select datanode randomly,
What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-4453
How was this patch tested?
Unit test is added.