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java.io.IOException: Buffer underflow

See original GitHub issue

Hello,

I ran into an issue while using ClassGraph version 4.8.65 with Java 8. ClassGraph is able to find most classes on my classpath, but there is one top-level class in particular for which it always throws a java.io.IOException: Buffer underflow error in the verbose output. I cloned down the classgraph repo, and updated the error handling to print the full stacktrace and got this:

java.io.IOException: Buffer underflow
at nonapi.io.github.classgraph.fileslice.reader.ClassfileReader.readTo(ClassfileReader.java:209)
at nonapi.io.github.classgraph.fileslice.reader.ClassfileReader.skip(ClassfileReader.java:395)
at io.github.classgraph.Classfile.readMethods(Classfile.java:1463)
at io.github.classgraph.Classfile.<init>(Classfile.java:1663)
at io.github.classgraph.Scanner$ClassfileScannerWorkUnitProcessor.processWorkUnit(Scanner.java:664)
at io.github.classgraph.Scanner$ClassfileScannerWorkUnitProcessor.processWorkUnit(Scanner.java:587)
at nonapi.io.github.classgraph.concurrency.WorkQueue.runWorkLoop(WorkQueue.java:246)
at nonapi.io.github.classgraph.concurrency.WorkQueue.runWorkQueue(WorkQueue.java:161)
at io.github.classgraph.Scanner.processWorkUnits(Scanner.java:342)
at io.github.classgraph.Scanner.performScan(Scanner.java:902)
at io.github.classgraph.Scanner.openClasspathElementsThenScan(Scanner.java:1044)
at io.github.classgraph.Scanner.call(Scanner.java:1079)
at io.github.classgraph.Scanner.call(Scanner.java:78)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

I can’t post the source code due to IP issues. So I tried to create a test class that resembled my issue as closely as possible, but was unable to reproduce the issue with that class.

I did, however, find 2 publicly available classes which produce the issue:

org.apache.datasketches.cpc.CompressionData from org.apache.datasketches:datasketches-java-1.1.0-incubating
com.google.thirdparty.publicsuffix.PublicSuffixPatterns from com.google.guava:guava:25.0-jre

Issue Analytics

State:
Created 3 years ago
Reactions:1
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

lukehutchcommented, Mar 30, 2020

Released in 4.8.66. Thanks again!

0reactions

lukehutchcommented, Mar 27, 2020

That’s the goal 😀 :

https://github.com/classgraph/classgraph/blob/master/Zero-Bugs-Commitment.md

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