Josh Elser created ACCUMULO-2362:
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Summary: Reduce blocking in client API (Tables)
Key: ACCUMULO-2362
URL: https://issues.apache.org/jira/browse/ACCUMULO-2362
Project: Accumulo
Issue Type: New Feature
Components: client
Affects Versions: 1.5.0, 1.4.4
Reporter: Josh Elser
Fix For: 1.7.0
Presently, the {{Tables}} class contains a static map of instance to ZooCache
that *many* of the . The problem with this is that many of the methods on
ZooCache ultimately are synchronized. When multiple threads using Connectors,
TableOperations, Scanners/BatchScanners, and BatchWriters against the same
Accumulo instance, you currently have a massive synchronization problem.
We should give some thought to heavy, concurrent access to Accumulo client API
calls within the same JVM. Consideration should also be given to the
consistency of wrapping zookeeper with a cache like is presently done.
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