All FAQ's

I have some jar files that are used by all of my web applications. Where can I put them so that I do not have to put them in WEB-INF/lib for every web application that I have?

What happened to bin/resin?

With Resin 2.1 used to run make; make install and then use the binary bin/resin to start Resin, but in Resin 3.0 I can't find the binary. What happened to it?

How can I bind to a port under 1024 and still run as a non-root user?

I want to bind resin to port 80, but my operating system only allows root to bind to ports under 1024. If I run Resin as root, it is a security risk. How can I start Resin as root but then change the user and group id after it is bound to the port?

Can I run multiple instances of Resin on the same machine?

One instance is for production, one for deployment testing.

Why do I get `can't connect to parent' after installing Resin?

Configuration FAQ

Where is the configuration GUI, and the GUI for deploying web-apps and new virtual hosts?

Where can I find the .rnc files that Resin uses for validating configuration files?

Can I precompile JSP's?

What impact does always-save-session have on performance?

We've seen significant performance issues when distributed sessions are enabled, and are trying to find some clues as to the cause. We've seen as much as 30% increase in cpu utilization when disttributed sessions are enabled, and we are using <always-save-session> .

Web Applications FAQ

When I have a jsp "index.jsp" and it does a forward to "target.jsp", request.getRequestURI() returns the path for "target.jsp". How can I get the value for the original uri?

Class.forName() doesn't seem to work right

When I do Class.forName(classname).getInstance() I do not seem to a newly loaded Class Object. It seems that I always just get the cached old version and not a new version if I compile a new Class into the classpath.

How do I specify the default file encoding?

I want to specify the default file encoding for InputStreamReader and OutputStreamReader, using the system property file.encoding, but it doesn't seem to work.

JSP FAQ

Why I am getting extra whitespace in the output of my JSP?

I'm getting a lot of whitespace in my JSP that I don't intend to be there. Why is it appearing and how can I get rid of it?

Security FAQ

Can I use different SSL certificates for each virtual host?

We have two domains on one server. Is there an example config file showing how to have multiple ssl certificates, one for each virtual host?

Why does Resin say I need OPENSSL_THREADS when I try to use OpenSSL?

Resin dies with an error on startup "Resin requires a threaded version of OpenSSL. OpenSSL must be compiled with OPENSSL_THREADS for Resin to use it."

What is the sequence of handshakes for an SSL connection?

XML/XSLT FAQ

How do I configure Resin 3 to apply a server-side XSLT transformation?

In 2.1.x I added a processing instruction and everything worked. In 2.1.x I did the following:

Set the content-type to application/xsl
Add a PI

How do I indicate the stylesheet to use for the transformation?

Resin's XsltFilter determines the stylesheet to apply from the first of:

Performance FAQ

How many concurrent users can a Resin server handle?

Does Resin use NIO for improved performance?

How does Resin use JNI?

Common Problems FAQ

Commonly encountered problems and error messages and their solution.

Specification version 1.3 of package javax.servlet, J2EE Specification, version 1.3 is not compatible with Resin Resin-3.0.x. Resin-3.0.x requires version 2.4.

class file has wrong version 48.0, should be 47.0

Symptoms

Troubleshooting/FAQ

Features