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chrisdchristo / capsule-maven-plugin

Capsule Maven Plugin

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FileWalker failure with large number of files

Downchuck opened this issue · comments

commented

I've got a large project that depends on hive-exec via "provides", because the environment already has it.

                    <manifest>
                        <entry>
                            <key>Dependencies</key>
                            <value>org.apache.hive:hive-exec:${hive.version}</value>
                        </entry>
                    </manifest>

I unpack all of the typical dependencies and build the project:

mvn -DoutputDirectory=target/classes/ dependency:unpack-dependencies
mvn compile
rm target/classes/META-INF/MANIFEST.MF

This gets me a big chunk of unpacked project, much as maven-assembly-plugin will do.
Now: mvn capsule:build

java.io.FileNotFoundException... Too many open files in system.
...
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:146)
    at capsule.CapsuleMojo$1.visitFile(CapsuleMojo.java:236)
    at capsule.CapsuleMojo$1.visitFile(CapsuleMojo.java:232)
    at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:135)
    at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:199)
    at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:199)
    at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:199)
    at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:199)
    at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:69)
    at java.nio.file.Files.walkFileTree(Files.java:2600)
    at java.nio.file.Files.walkFileTree(Files.java:2633)
    at capsule.CapsuleMojo.buildThin(CapsuleMojo.java:232)
commented

Ah thanks for reporting. I have no way of replicating the error, perhaps you could share a demo project so I can attempt to fix the error. I closed the stream in the latest snapshot, please give 0.9.1-SNAPSHOT a try.

commented

That fix will work -- you have to have -a-lot- of class files on your path to replicate the error. I also fixed the error by closing the input stream. Marking this as fixed.