NonStop Servlets for JavaServer Pages (NSJSP) 7.0 System Administrator's Guide

Configuring NSJSP
NonStop Servlets for JavaServer Pages (NSJSP) 7.0 System Administrator’s Guide—674372-005
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The Installation-Specific servlet.config File
The following are the configuration parameters defined by TS/MP for server classes.
For more information on these parameters, see the NonStop TS/MP System
Management Manual. The following descriptions are applicable to NSJSP only.
NUMSTATIC and MAXSERVERS
In the default configuration, both these parameters have the same value. This
means there are no dynamic servers configured for NSJSP. HP recommends that
you do not configure dynamic servers. This is because, the long startup time for
NSJSP processes might lead to requests getting queued, which might also result
in application timeouts.
Stdout and Stderr
Specifies the standard out and standard error files respectively. The JNI library of
NSJSP writes messages to these files. Although most of the messages are written
during startup, errors encountered on operations on with $RECEIVE are written to
the standard error file during run time. Based on the message type, log entries
created by NSJ are also written to either the Stdout file or the Stderr file.
Starting from NSJSP 7.0, both these files have been combined to derive one single
out file. The complete name of the out file is derived from the name of the server
class to which it belongs.
The out file of the Servlet Server Class is <Server Class Name>.STD.out.
The out log file of the Servlet Server Class is defined in the servlet.config file.
You cannot configure the settings of the out files. Also, the out file does not
support log rollover.
MAXLINKS and LINKDEPTH
The MAXLINKS and LINKDEPTH parameters are each set to 8 and 2
respectively by default. These values may require tuning, depending upon the
NSJSP request load and the number of CPUs in the HP NonStop system. For
improved load balancing and better response times, smaller values for both
parameters may provide better results.
Miscellaneous
The Region Directive
The Region directive is used to prevent access to the Servlets and JSPs through the
Invoker Servlet. The Invoker Servlet allows applications to dynamically
register new servlets and to invoke a servlet using the fully qualified servlet class
name. Allowing such servlet invocations might lead to security problems. For more
information on the Invoker Servlet, see http://tomcat.apache.org/tomcat-
7.0-
doc/funcspecs/fs-default.html.