Sylvain Lebresne created CASSANDRA-5699:
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Summary: Streaming (2.0) can deadlock
Key: CASSANDRA-5699
URL: https://issues.apache.org/jira/browse/CASSANDRA-5699
Project: Cassandra
Issue Type: Bug
Reporter: Sylvain Lebresne
Assignee: Sylvain Lebresne
Fix For: 2.0 beta 1
The new streaming implementation (CASSANDRA-5286) creates 2 threads per host
for streaming, one for the incoming stream and one for the outgoing one.
However, both currently share the same socket, but since we use synchronous
I/O, a read can block a write, which can result in a deadlock if 2 nodes are
both blocking on a read a the same time, thus blocking their respective writes
(this is actually fairly easy to reproduce with a simple repair).
So instead attaching a patch that uses one socket per thread.
The patch also correct the stream throughput throttling calculation that was
8000 times lower than what it should be.
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