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The "HowTo/FasterStartUp" page has been changed by KonstantinKolinko: https://wiki.apache.org/tomcat/HowTo/FasterStartUp?action=diff&rev1=23&rev2=24 Comment: Add title for General section. Add link to JEP-123 (SecureRandom improvements in Java 8) that was mentioned on users mailing list. This section provides several recommendations on how to make your web application and Apache Tomcat as a whole to start up faster. + == General == + - Before we continue to specific tips and tricks, the general advice is that if Tomcat hangs or is not responsive, you have to perform diagnostics. That is to take '''several thread dumps''' to see what Tomcat is really doing. See [[FAQ/Troubleshooting_and_Diagnostics|Troubleshooting and Diagnostics]] page for details. + Before we continue to specific tips and tricks, the general advice is that if Tomcat hangs or is not responsive, you have to perform diagnostics. That is to '''take several thread dumps''' to see what Tomcat is really doing. See [[FAQ/Troubleshooting_and_Diagnostics|Troubleshooting and Diagnostics]] page for details. == JAR scanning == @@ -77, +79 @@ There is a way to configure JRE to use a non-blocking entropy source by setting the following system property: `-Djava.security.egd=file:/dev/./urandom` - Note the "`/./`" characters in the value. They are needed to work around known [[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6202721|Oracle JRE bug #6202721]]. + Note the "`/./`" characters in the value. They are needed to work around known [[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6202721|Oracle JRE bug #6202721]]. See also [[http://openjdk.java.net/jeps/123|JDK Enhancement Proposal 123]]. It is known that implementation of SecureRandom was improved in Java 8 onwards. Also note that replacing the blocking entropy source (/dev/random) with a non-blocking one actually reduces security because you are getting less-random data. If you have a problem generating entropy on your server (which is common), consider looking into entropy-generating hardware products such as "EntropyKey". --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
