Mike Percy created FLUME-2300:
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Summary: Allow for multiple concurrent channel transactions from
the same thread
Key: FLUME-2300
URL: https://issues.apache.org/jira/browse/FLUME-2300
Project: Flume
Issue Type: Bug
Components: Channel
Reporter: Mike Percy
Currently, due to BasicTransactionSemantics, there is a ThreadLocal which holds
a txn hostage, allowing for only one transaction per thread. This is extremely
limiting for situations where you want to have overlapping windows of
transactions, for example take for some time and stream the events somewhere,
then wait for acknowledgments while you start a new txn and continue streaming
events in a new txn "window" instead of blocking.
In my opinion BasicTransactionSemantics is deeply flawed and we should provide
an alternative API on existing channels that exposes the raw transactions and
trusts components to use them correctly, while maintaining backward
compatibility.
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