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TIBCO GridServer® 7.1.0

# Diagnosing Driver Issues

The following section gives some information about reading logs related to Drivers, and solutions to some common issues.

## Driver Cannot Log In to Manager

When a Driver cannot log in to a Manager, messages similar to the following appears in the Manager log:

    LoginPlugin Can't log in to PrivateBrokerConnection
    LoginPlugin Failed login on http://162.60.27.152:8000/livecluster/director/PublicDriverChannel so trying next. Error:
    File not found: http://162.60.27.152:8000/livecluster/director/PublicDriverChannel

When this happens, try the following:

| • | Ping and telnet to the Manager and port number to test network connectivity.

| • | Check the user name, password, and Director values in the `driver.properties` file (or values coded in application).

| • | If using SSL, make sure the certificate is valid.

## Client Timeout Issues

You might see timeout error messages in the Driver log similar to the following:

    java.io.IOException: Unexpected exception while reading data from http://172.24.68.49:1667/ds-6353115010724789381/job.tasklet: com.livecluster.util.threadpool.TimeoutException: Thread DefaultPool-6:
    http://172.24.68.49:1667/ds-6353115010724 789381/job.tasklet timed out

The Client Timeout setting allows for the Driver to log back in after logging off due to temporary network issues, without interrupting Services. Go to Admin > System Admin > Manager Configuration > Communication; under the HTTP Connections heading, you can increase read and write timeout values for Drivers.

Also, the Driver must not failover to another Broker too quickly. This is set in `DSBrokerTimeout` in the `driver.properties` file. The default is 300 seconds, or five minutes.

To ensure your tasks are not lost in the event of Broker failure, set Engine Timeout Minutes (at Admin > System Admin > Manager Configuration > Engines and Clients, under the Engine Login heading) for a period of time longer than the Client Timeout Minutes on the same page, under the Client Management heading. For example, if Client Timeout Minutes is set to five minutes, a good number for Engine Timeout Minutes is eight minutes. Note that changes to this value are only applied at the next Engine Login.

## Manager Turning Away Clients

By default, Drivers are turned away if there is a version mismatch between Client and Manager. A message similar to the following appears in the Manager log:

    [BrokerLoginManager] Turning away client: Client module version mismatch: ClientJavaVersion version: 7.0.0: should be 7.1.0.

To override this, go to Admin > System Admin > Manager Configuration > Admin, and under the Version Management heading, set Allow Driver Version Mismatch to true until the Client can be upgraded.

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