Bruce Schuchardt created GEODE-4450:
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Summary: setting a client/server diffie-hellman algorithm breaks
client/server subscriptions
Key: GEODE-4450
URL: https://issues.apache.org/jira/browse/GEODE-4450
Project: Geode
Issue Type: Improvement
Components: client/server
Reporter: Bruce Schuchardt
Having found that there are no tests for the security-client-dhalgo setting I
modified a test to use it. The client/server handshake in the subscription
thread (cache client updater) hung on the server side trying to read client
credentials.
I tracked this down to CacheClientNotifier.registerClient, which sends a 105
byte to the client along with some other bytes in its writeMessage() method.
The client isn't expecting this message and interprets the 105 as a failure to
register with the server. The client then abandons the handshake and the
server hangs until its read times out.
See also GEODE-4353, which wants to deprecate this broken feature.
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