[DERBY-395] Server-side "trace on" and "trace off" commands do not appear to be working correctly.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.0.2.2, 10.1.1.0
• Fix Version/s: 10.1.3.1, 10.2.1.6
• Component/s: Network Server
• Environment: Running Derby Network Server with either JCC or Derby client.
• Assignee: Bryan Pendleton
• Reporter: A B
• Created: 28/Jun/05 09:24
• Updated: 24/May/06 04:33
• Resolved: 01/May/06 00:05

Description

Documentation in the Server & Admin guide talks about a "derby.drda.traceAll" system property and two trace commands available from the NetworkServerControl API: "trace on" and "trace off". The "trace on" command is supposed to turn tracing on for all server sessions, unless a specific session number is passed in via the "-s" parameter. Similarly, the "trace off" command is supposed to turn tracing off for all server sessions, unless a specific session number is passed in via the "-s" parameter.

However, I've noticed the following behavior, which appears to be incorrect.

1) if the server is started with derby.drda.traceAll=true, then subsequent attempts to turn tracing off do not work. For example:

// Start the server with 'traceAll' set to true.
> java -Dderby.drda.traceAll=true org.apache.derby.drda.NetworkServerControl start
Server is ready to accept connections on port 1527.

// Try to turn tracing off.
> java org.apache.derby.drda.NetworkServerControl trace off
Trace turned off for all sessions.

But then, despite the message saying that trace was turned off, tracing is still enabled for all connections thereafter: if I connect three more times, I will see a 'ServerX.trace' file for each connection.

2) If the server is started with derby.drda.traceAll=false, then attempts to turn tracing on only affect the connection that enables tracing; tracing will NOT be done for any subsequent connections. For ex:

// Start the server with 'traceAll' set to false (which is also the default)
> java -Dderby.drda.traceAll=false org.apache.derby.drda.NetworkServerControl start
Server is ready to accept connections on port 1527.

// Turn tracing on.
> java org.apache.derby.drda.NetworkServerControl trace on
Trace turned on for all sessions.

Now I see a 'ServerX.trace' for the connection that was made to turn tracing on. However, if I then connect three more times, I will not see any 'ServerX.trace' files for those connections.