Manno15 opened a new issue #2035: URL: https://github.com/apache/accumulo/issues/2035
**Describe the bug** The original bug was reported here: https://issues.apache.org/jira/browse/ACCUMULO-4160 If an iterator was misconfigured on a table (specifically for minor compaction in my testing), it can prevent other tables from loading their tablets as well as being able to perform operations on them beyond taking it offline and online. **Versions (OS, Maven, Java, and others, as appropriate):** - Affected version(s) of this project: 2.1.0 **To Reproduce** To reproduce, I edited an iterator (RowDeletingIterator for example) to throw an exception. This mimics the `BadIterator` class. After that: 1. Create two tables in accumulo and ingest something to get one tablet in each. 2. Configure one table to use this iterator in minc scope (Scan seemed to have proper error checking when done with a misconfigured iterator). 3. Flush the table with the bad iterator. This will cause the shell to hang indefinitely. Minor compaction will repeat until it completes which cannot happen unless the bad iterator is deleted. 4. Kill the Tserver and bring it back up. The table with the bad iterator will never load. 5. If the good table is brought offline to online, it also will never load and no operation can be done on it again. Deleting the bad iterator will allow the minor compaction and the Tserver go to back to a healthy state. **Expected behavior** To not block other tablets from being loaded due to one table having a misconfigured iterator and minor compacting indefinitely. **Additional context** It does seem that the main bug only occurs when the Tserver dies and is brought back up. Logs suggest it is still attempting to minor compact. A solution to the shell hanging indefinitely and possibly an error message to the user could allow someone to notice the misconfigured iterator earlier and be deleted. This has also been tested with `MultiTableRecoverIT` which uses agitation to test recovery. If one of the tables in that IT is given a misconfigured iterator, the test will hang until it timeouts. -- 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. For queries about this service, please contact Infrastructure at: [email protected]
