Hi Sanne, Thanks, we already have the required patches installed on the Jenkins build server for testing purposes. In fact it’s a minimum of three bugs. It fixes all those bugs reported in the issues.
The patch we have installed can be found on LUCENE-3335: https://issues.apache.org/jira/secure/attachment/12487824/patch-0uwe.patch Uwe ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Sanne Grinovero [mailto:sanne.grinov...@gmail.com] > Sent: Friday, July 29, 2011 11:11 AM > To: java-user@lucene.apache.org > Cc: gene...@lucene.apache.org; solr-u...@lucene.apache.org > Subject: Re: [WARNING] Index corruption and crashes in Apache Lucene > Core / Apache Solr with Java 7 > > Hello, > thanks for the warning, that's a pretty nasty bug. > > A patch was made for OpenJDK, if anybody is interested to try it out that > would be great: > http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/4e761e7e6e12 > > Regards, > Sanne > > 2011/7/28 Uwe Schindler <uschind...@apache.org>: > > Hello Apache Lucene & Apache Solr users, Hello users of other > > Java-based Apache projects, > > > > Oracle released Java 7 today. Unfortunately it contains hotspot > > compiler optimizations, which miscompile some loops. This can affect > > code of several Apache projects. Sometimes JVMs only crash, but in > > several cases, results calculated can be incorrect, leading to bugs in > > applications (see Hotspot bugs 7070134 [1], 7044738 [2], 7068051 [3]). > > > > Apache Lucene Core and Apache Solr are two Apache projects, which are > > affected by these bugs, namely all versions released until today. Solr > > users with the default configuration will have Java crashing with > > SIGSEGV as soon as they start to index documents, as one affected part > > is the well-known Porter stemmer (see LUCENE-3335 [4]). Other loops in > > Lucene may be miscompiled, too, leading to index corruption > > (especially on Lucene trunk with pulsing codec; other loops may be > affected, too - LUCENE-3346 [5]). > > > > These problems were detected only 5 days before the official Java 7 > > release, so Oracle had no time to fix those bugs, affecting also many > > more applications. In response to our questions, they proposed to > > include the fixes into service release u2 (eventually into service release > > u1, > see [6]). > > This means you cannot use Apache Lucene/Solr with Java 7 releases > > before Update 2! If you do, please don't open bug reports, it is not > > the committers' fault! At least disable loop optimizations using the > > -XX:-UseLoopPredicate JVM option to not risk index corruptions. > > > > Please note: Also Java 6 users are affected, if they use one of those > > JVM options, which are not enabled by default: > > -XX:+OptimizeStringConcat or -XX:+AggressiveOpts > > > > It is strongly recommended not to use any hotspot optimization > > switches in any Java version without extensive testing! > > > > In case you upgrade to Java 7, remember that you may have to reindex, > > as the unicode version shipped with Java 7 changed and tokenization > > behaves differently (e.g. lowercasing). For more information, read > > JRE_VERSION_MIGRATION.txt in your distribution package! > > > > On behalf of the Lucene project, > > Uwe > > > > [1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7070134 > > [2] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7044738 > > [3] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7068051 > > [4] https://issues.apache.org/jira/browse/LUCENE-3335 > > [5] https://issues.apache.org/jira/browse/LUCENE-3346 > > [6] http://s.apache.org/StQ > > > > ----- > > Uwe Schindler > > uschind...@apache.org > > Apache Lucene PMC Member / Committer > > Bremen, Germany > > http://lucene.apache.org/ > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
