[jira] [Created] (COUCHDB-2431) Improve debugging and error messages of query server communication

["Martin Monperrus (JIRA)" <ji...@apache.org>]

Martin Monperrus created COUCHDB-2431:
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             Summary: Improve debugging and error messages of query server communication
                 Key: COUCHDB-2431
                 URL: https://issues.apache.org/jira/browse/COUCHDB-2431
             Project: CouchDB
          Issue Type: Improvement
      Security Level: public (Regular issues)
            Reporter: Martin Monperrus


I end an intense debugging session of Couchdb. The problem lied in the query server.

The difficulty of debugging the query server communication comes from the fact that the Couchdb log always contains the same error: "os_process_error, OS process timed out." regardless of the actual error. 

The same error message is used for very different errors:
- query server executable not found
- query server executable not executable (wrong permissions)
- query server crashes at startup
- query server hangs
- query server replies garbage
- query invalid
- query execution too long





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