System Properties

The follow sections list the system properties that may be set to modify the default Tomcat behaviour.

Property	Description
org.apache.coyote.tomcat4. CoyoteAdapter.ALLOW_BACKSLASH	If this is true the '\' character will be permitted as a path delimiter. If not specified, the default value of false will be used.
org.apache.tomcat.util.buf. UDecoder.ALLOW_ENCODED_SLASH	If this is true '%2F' and '%5C' will be permitted as path delimiters. If not specified, the default value of false will be used.
org.apache.coyote. USE_CUSTOM_STATUS_MSG_IN_HEADER	If this is true custom HTTP status messages will be used within HTTP headers. Users must ensure that any such message is ISO-8859-1 encoded, particularly if user provided input is included in the message, to prevent a possible XSS vulnerability. If not specified the default value of false will be used.

Property	Description
org.apache.catalina. STRICT_SERVLET_COMPLIANCE	If this is true cookies will be parsed strictly and v0 cookies will not work with any invalid characters. If set to false, any v0 cookie with invalid characters will be switched to a v1 cookie and the value will be quoted. If not specified, the default value of false will be used.
org.apache.tomcat.util.http. ServerCookie.ALWAYS_ADD_EXPIRES	If this is true Tomcat will always add an expires parameter to a SetCookie header even for cookies with version greater than zero. This is to work around a known IE6 and IE7 bug that causes IE to ignore the Max-Age parameter in a SetCookie header.If not specified, the default value of true will be used.

Property	Description
catalina.useNaming	If this is false it will override the useNaming attribute for all Context elements.
catalina.config	The URL for the catalina.properties configuration file.
loader.config	The URL for the loader.properties configuration file.
tomcat.util.buf.StringCache.byte.enabled	If true, the String cache is enabled for ByteChunk. If not specified, the default value of false will be used.
tomcat.util.buf.StringCache.char.enabled	If true, the String cache is enabled for CharChunk. If not specified, the default value of false will be used.
tomcat.util.buf.StringCache.trainThreshold	The number of times toString() must be called before the cache is activated. If not specified, the default value of 20000 will be used.
tomcat.util.buf.StringCache.cacheSize	The size of the String cache. If not specified, the default value of 200 will be used.
tomcat.util.buf.StringCache.maxStringSize	The maximum length of String that will be cached. If not specified, the default value of 128 will be used.