[MXS-249] Questionable error messages from backend connections Created: 2015-07-07  Updated: 2015-07-08  Resolved: 2015-07-08

Status: Closed
Project: MariaDB MaxScale
Component/s: mariadbbackend
Affects Version/s: 1.2.0
Fix Version/s: 1.2.0

Type: Bug Priority: Minor
Reporter: martin brampton (Inactive) Assignee: markus makela
Resolution: Fixed Votes: 0
Labels: None
Environment:

CentOS Digital Ocean VPS



 Description   

Running tests using mysqlslap results in errors:
2015-07-07 04:26:21 Backend hangup error handling.
2015-07-07 04:26:21 Backend hangup -> closing session.
2015-07-07 04:26:27 Hangup in session that is not ready for routing, Error reported is ' [Pðÿ^?'.
2015-07-07 04:26:29 Backend hangup error handling.
2015-07-07 04:26:29 Backend hangup -> closing session.
etc.

The error the quotes peculiar characters is infrequent, but the others repeat many times.

The error messages are not clear as to what the error is, and it is unclear whether they are genuinely errors. Needs investigation.



 Comments   
Comment by markus makela [ 2015-07-07 ]

Those messages are caused when a query is routed even through the session is already closing. There is preliminary work done on the rwsplit_fixes branch which also has other fixes related to sessions closing.

Comment by markus makela [ 2015-07-08 ]

The backend error messages were caused by a lack of session state checks and were in reality expected hangups.

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