[ https://jira.duraspace.org/browse/DS-1396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=26983#comment-26983 ]
Ian Boston commented on DS-1396: -------------------------------- A webapp with this code as a context listener public class SecureRandomContextListener implements ServletContextListener { @Override public void contextInitialized(ServletContextEvent sce) { System.err.println("Context Being initialsed, testing SecureRandom"); // this should use /dev/urandom and not block long t = System.currentTimeMillis(); SecureRandom sr = new SecureRandom(); int i = sr.nextInt(); long ttaken = System.currentTimeMillis()-t; System.err.println("Got first random "+i+" after "+ttaken+" ms"); try { t = System.currentTimeMillis(); // this will need seeding and may block SecureRandom sr2 = SecureRandom.getInstance("SHA1PRNG"); i = sr2.nextInt(); ttaken = System.currentTimeMillis()-t; System.err.println("Got PSHA1PRNG ran random "+i+" after "+ttaken+" ms"); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } System.err.println("Context Initialsed"); } @Override public void contextDestroyed(ServletContextEvent sce) { System.err.println("Context Being Destroyed"); } } produces this output INFO: Deploying web application directory /dspace3/webapps/test Context Being initialsed, testing SecureRandom Got first random 290438140 after 3 ms Got PSHA1PRNG ran random -204657877 after 0 ms Context Initialsed 23-Nov-2012 02:32:55 org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-nio-127.0.0.1-8080"] However, I have been able to reproduce pauses with another java based app on the box so this is not an issue with DSpace per se. > Very slow startup on Linux Platforms > ------------------------------------ > > Key: DS-1396 > URL: https://jira.duraspace.org/browse/DS-1396 > Project: DSpace > Issue Type: Bug > Affects Versions: 3.0 > Environment: Linux version 2.6.32-38-server (buildd@allspice) (gcc > version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) > /usr/lib/jvm/java-6-sun/bin/java > -Djava.util.logging.config.file=/usr/local/tomcat7/conf/logging.properties > -Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom -Xms256m > -Xmx800m -XX:PermSize=256m -XX:NewSize=64m -server -XX:+UseConcMarkSweepGC > -Djava.net.preferIPv4Stack=true > -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager > -Djava.endorsed.dirs=/usr/local/tomcat7/endorsed -classpath > /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar > -Dcatalina.base=/usr/local/tomcat7 -Dcatalina.home=/usr/local/tomcat7 > -Djava.io.tmpdir=/tmp/tomcat7-tmp org.apache.catalina.startup.Bootstrap start > Reporter: Ian Boston > Priority: Critical > > I am experiencing extremely slow startup times for DS3-rc3 on Linux with the > stock sun JVM, and I have experienced total hangs 11:19-15:09 of the JVM with > perfect operation after the end of the period (no restart of any form was > required). By slow startup I mean just bringing up solr, xmlui and jspui can > take 60 minutes. > I think this is due to /dev/ramdom on the OS not getting sufficient entropy, > probably caused by the Bouncy Castle crypto APIs or the new SecureRandom() in > Eperson. > performing a > find / > as root appears to unstick the JVM on startup, pointing to an entropy issue > (find / will cause disk I/O not from cache generating low level device driver > entropy) > Has anyone else seen these issues ? > Is there a known fix (other than performing a find) > I have already tried -Djava.security.egd=file:/dev/./urandom -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Dspace-devel mailing list Dspace-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-devel