Core dump: Sun Hotspot JVM 1.3.1_11b-02 optimizer core dumps optimizing a
Xalan method
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Key: XALANJ-1986
URL: http://nagoya.apache.org/jira/browse/XALANJ-1986
Project: XalanJ2
Type: Bug
Components: transformation, Xalan, Xalan-extensions
Versions: 2.4Dx
Environment: Sun Sparc Workstation Netra-T4, Solaris 5.9, Sun Hotspot JVM
1.3.1_11-b02 (Optimization ON), BEA Weblogic 7.0 SP4 running Java Webapps (no
JNI/native code), XalanJ2 (Implementation version 2.4.D1)
Reporter: Manish D Jani
Priority: Blocker
Problem:
We have four systems each configured as specified above in the Environment
section. Since the last few weeks, except for one, the rest of the 3 systems
are dumping core averaging at one per day.
On Sun's advise, we have enabled the -XX:+PrintCompilation option for the JVM.
For every core dump now, we see one or the other Xalan method's being called
immediately before the system dumps core. Below are the methods we have come
across so far:
org.apache.xalan.extensions.MethodResolver::getMethod
org.apache.xalan.transformer.ResultTreeHandler::sendEndPrefixMappings
org.apache.xalan.transformer.ResultTreeHandler::flushPending
org.apache.xalan.extensions.ExtensionHandlerJavaClass::callFunction
In some of the core dumps, we have seen the JVM crash when in the append() and
the toUpperCase() methods.
On Sun's advise, so far we have excluded the
org.apache.xalan.extensions.MethodResolver::getMethod &
org.apache.xalan.transformer.ResultTreeHandler::sendEndPrefixMappings from the
Hotspot optimizations. After exclusion, none of the core dumps have displayed
these methods in compilation immediately prior to the core dumps.
Are there threading issues or any known issues in the use of extensions or
transformers that could bring down the JVM Hotspot JIT optimizer to core dump?
Xalan version (Manifest file):
==============================
Manifest-Version: 1.0^M
Main-Class: org.apache.xalan.xslt.Process^M
Created-By: 1.2.2 (Sun Microsystems Inc.)^M
Class-Path: jaxp.jar xercesImpl.jar crimson.jar xml-apis.jar^M
^M
Name: org/apache/xml^M
Implementation-Vendor: Apache Software Foundation^M
Implementation-URL: http://xml.apache.org/xalan-j/dist/^M
Implementation-Version: 2.4.D1^M
Implementation-Title: org.apache.xml^M
Comment: DTM implementation and utilities^M
^M
Name: org/apache/xpath^M
Implementation-Vendor: Apache Software Foundation^M
Implementation-URL: http://xml.apache.org/xalan-j/dist/^M
Implementation-Version: 2.4.D1^M
Implementation-Title: org.apache.xpath^M
Comment: XPath engine^M
^M
Name: org/apache/xalan^M
Specification-Title: Java API for XML Processing^M
Specification-Vendor: Sun Microsystems Inc.^M
Implementation-Vendor: Apache Software Foundation^M
Implementation-URL: http://xml.apache.org/xalan-j/dist/^M
Specification-Version: 1.1^M
Implementation-Version: 2.4.D1^M
Implementation-Title: org.apache.xalan^M
Comment: Main Xalan engine implementing TrAX/JAXP^M
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