Thanks for your prompt response, you are right Jim. There is a static
dependency to Log4J in my lexicoder. Adding the Log4J Jar to the classpath
solved the problem.
Would you suggest to use an Uber Jar to avoid this kind of problems?
Regards,
Massimiliano
From: James Hughes <jn...@virginia.edu>
To: user@accumulo.apache.org
Date: 07/07/2016 06:25 PM
Subject: Re: java.lang.NoClassDefFoundError with fields of custom
Filter
Hi Massimilian,
As a quick note, your error says that it could not initialize class
accumulo.lexicoders.MyLexicoder. Did you provide all the dependencies for
your class on Accumulo's classpath?
That exception (or similar) can occur if there is a static block in your
MyLexicoder class which can't run properly.
Cheers,
Jim
On Thu, Jul 7, 2016 at 11:19 AM, Massimilian Mattetti <massi...@il.ibm.com
> wrote:
Hi,
I have implemented a custom filter and a custom lexicoder. Both this two
classes are packed in the same jar that has been deployed under the
directory $ACCUMULO_HOME/lib/extof my Accumulo servers (version 1.7.1).
The lexicoder is used by the filter to get the real object from the
accumulo value and test some conditions on it. When I tried to scan the
table applying this filter I got the following exception:
Caused by: java.lang.NoClassDefFoundError: Could not initialize class
accumulo.lexicoders.MyLexicoder
at accumulo.filters.MyFilter.<init>(MyFilter.java:24)
at sun.reflect.GeneratedConstructorAccessor9.newInstance(Unknown
Source)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at java.lang.Class.newInstance(Class.java:442)
at
org.apache.accumulo.core.iterators.IteratorUtil.loadIterators(IteratorUtil.java:261)
at
org.apache.accumulo.core.iterators.IteratorUtil.loadIterators(IteratorUtil.java:237)
at
org.apache.accumulo.core.iterators.IteratorUtil.loadIterators(IteratorUtil.java:218)
at
org.apache.accumulo.core.iterators.IteratorUtil.loadIterators(IteratorUtil.java:205)
at
org.apache.accumulo.tserver.tablet.ScanDataSource.createIterator(ScanDataSource.java:193)
at
org.apache.accumulo.tserver.tablet.ScanDataSource.iterator(ScanDataSource.java:127)
at
org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.seek(SourceSwitchingIterator.java:180)
at
org.apache.accumulo.tserver.tablet.Tablet.nextBatch(Tablet.java:880)
at
org.apache.accumulo.tserver.tablet.Scanner.read(Scanner.java:98)
at
org.apache.accumulo.tserver.scan.NextBatchTask.run(NextBatchTask.java:69)
at
org.apache.htrace.wrappers.TraceRunnable.run(TraceRunnable.java:57)
... 4 more
I do not undestand how it is possible that the class loader is able to
find the filter and no the lexicoder. Am I missing something?
Thanks,
Massimiliano
