[NUTCH-2316] Library conflict with Parser-Tika Plugin and Lib Folder

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.11
• Fix Version/s: 1.14
• Component/s: parser
• Assignee: Sebastian Nagel
• Reporter: Christian Weber
• Created: 22/Sep/16 08:46
• Updated: 13/Mar/24 14:51
• Resolved: 18/Aug/17 14:36

Description

Hello Apache Nutch Team,

everytime Nutch wants to parse a *.class file this Exception pops up:

java.util.concurrent.ExecutionException: java.lang.IncompatibleClassChangeError: class org.apache.tika.parser.asm.XHTMLClassVisitor has interface org.objectweb.asm.ClassVisitor as super class
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at org.apache.nutch.parse.ParseUtil.runParser(ParseUtil.java:171)
at org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:95)
at org.apache.nutch.parse.ParseSegment.map(ParseSegment.java:103)
at org.apache.nutch.parse.ParseSegment.map(ParseSegment.java:45)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342)
at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IncompatibleClassChangeError: class org.apache.tika.parser.asm.XHTMLClassVisitor has interface org.objectweb.asm.ClassVisitor as super class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.tika.parser.asm.ClassParser.parse(ClassParser.java:51)
at org.apache.nutch.parse.tika.TikaParser.getParse(TikaParser.java:132)
at de.qaware.qasearch.nutch.parse.SafetyTikaParser.getParse(SafetyTikaParser.java:73)
at org.apache.nutch.parse.ParseCallable.call(ParseCallable.java:35)
at org.apache.nutch.parse.ParseCallable.call(ParseCallable.java:24)
... 4 more

What I have found out is

• ASM-Library is a library used inside TIKA Parser, and it has a breaking change with a certain version (3.x stated in TIKA-1240).
• parse-tika has the correct Version inside it's Plugin Folder (tika-parser 1.11 uses asm 5.0.4, see http://mvnrepository.com/artifact/org.apache.tika/tika-parsers/1.11).
• inside the nutch/lib folder is a asm jar with Version 3.3.1 which is incompatible

I guess the Problem is that the JVM executing Nutch uses the asm library from inside the nutch/lib folder.

(This Issue is related with NUTCH-2071. I hope it's okay that I opened a new Issue)

Issue Links

• Is contained by: NUTCH-2378 ChildFirst plugin classloader
• relates to: NUTCH-2071 A parser failure on a single document may fail crawling job if parser.timeout=-1