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Posted to notifications@accumulo.apache.org by GitBox <gi...@apache.org> on 2021/05/05 15:47:22 UTC
[GitHub] [accumulo] keith-turner opened a new issue #2082: Remove compactors in ZK w/ no children
keith-turner opened a new issue #2082:
URL: https://github.com/apache/accumulo/issues/2082
Compactors register their-self in ZK w/ a service lock. Service locks are a persistent node w/ ephemeral nodes underneath. If compactors come and go and different addresse+port, then this can pollute ZK w/ persistent host+port nodes w/o any children. The Coordinator should periodically scan for persistent compactor nodes w/ no children and delete them.
The manager does a similar thing for Tservers in the class LiverTserverSet, however the handling of this case in the manager is mixed in w/ lots of other things. One thing worth taking from the Manager code is [ignoring the ZK NotEmptyException](https://github.com/apache/accumulo/blob/16a3cec36981a694ecdfbefb839ecf9ddd70a535/server/base/src/main/java/org/apache/accumulo/server/manager/LiveTServerSet.java#L280-L288) when trying to delete. This a race condition that could occur in the case where between reading the children from ZK and deleting that something was created.
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[GitHub] [accumulo] dlmarion commented on issue #2082: Remove compactors in ZK w/ no children
Posted by GitBox <gi...@apache.org>.
dlmarion commented on issue #2082:
URL: https://github.com/apache/accumulo/issues/2082#issuecomment-836627390
was this addressed in b9ddb33c5920663990885bae5a17b90f0976315f?
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[GitHub] [accumulo] keith-turner closed issue #2082: Remove compactors in ZK w/ no children
Posted by GitBox <gi...@apache.org>.
keith-turner closed issue #2082:
URL: https://github.com/apache/accumulo/issues/2082
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