NoSuchMethodError exception java.nio.MappedByteBuffer.position in ELF analyzer #2815
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vladak
changed the title
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The code in question in 106 public String parseELF(FileChannel fch) throws IOException {
107 MappedByteBuffer fmap = fch.map(FileChannel.MapMode.READ_ONLY, 0, fch.size());
108 ELFHeader eh = new ELFHeader(fmap);
...
185 private static class ELFHeader {
...
211 ELFHeader(MappedByteBuffer fmap) throws IllegalArgumentException {
212 if (fmap.get(ELFIdentification.EI_MAG0.value()) != 0x7f ||
213 fmap.get(ELFIdentification.EI_MAG1.value()) != 'E' ||
214 fmap.get(ELFIdentification.EI_MAG2.value()) != 'L' ||
215 fmap.get(ELFIdentification.EI_MAG3.value()) != 'F') {
216 throw new IllegalArgumentException("Not an ELF file");
217 }
218
219 ei_class = EI_Class.valueOf(fmap.get(ELFIdentification.EI_CLASS.value()));
...
229 fmap.position(ELFIdentification.EI_NIDENT.value());So, the |
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Actually, what is "system provided Java 8" exactly ? |
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I'm using the |
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Just to be sure, could you run the indexer with |
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Also, I wonder how many ELF files do you have in your projects and whether all of the suffer from this problem. |
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verbose output: There's only one jar file |
ELF files do show up in a fair number of projects... |
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For reference on my laptop with Ubuntu 18.04 and Oracle Java 8 (build 1.8.0_181-b13) I stepped through the |
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The verbose output should look like this: i.e. the |
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Hence, your indexer line should look like this: |
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So then the output is this? |
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From the |
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My OpenJDK version from Ubuntu: |
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Could you post the complete output w.r.t. the |
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Attached: opengrok-index-run.txt |
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Hm, I don't see anything wrong there. |
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@vladak Have you tried running 1.2.14 with Ubuntu's OpenJDK? |
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Nope. The Travis builds run with xenial+OpenJdk8 tho.
Dne st 19. 6. 2019 15:34 uživatel Neal Gompa (ニール・ゴンパ) <
[email protected]> napsal:
… @vladak <https://github.com/vladak> Have you tried running 1.2.14 with
Ubuntu's OpenJDK?
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Is there any additional data I can provide on this, as I'm seeing something similar? (referenced from #2122) CentOS Linux release 7.6.1810 (Core) [Loaded java.nio.MappedByteBuffer from /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.212.b04-0.el7_6.x86_64/jre/lib/rt.jar] |
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Maybe you could try to find out if this is data driven, i.e. try to reduce the indexed data to the point when the issue is still happening. I wonder if this happens with just a single ELF file under source root. |
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So I previously had 10-12 different source codes in my src folder. Cut out all but one to reduce the possible data. If I ignore any line from std out that's just loading code in verbose mode: this is standard out" 18:17:39 WARNING: Error from ctags: ctags: Warning: Language "clojure" already defined 18:17:52 SEVERE: ERROR addFile(): 18:17:52 WARNING: An error occurred while finishing writer and completer 18:17:52 WARNING: An error occurred while finishing writer and completer 18:17:52 SEVERE: Failed with unexpected RuntimeException 18:17:52 SEVERE: Problem updating index database in directory /usr/opengrok/data-2/index/index-test: I'll see if I can scrub and attach the opengrok0.0.log |
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I'm experiencing this problem also. Searching around shows other applications experiencing the problem on Java 8 when built with Java 9 or greater. I'm new to Opengrok, but did I see the releases are built using Java 11? Hopefully what I found helps. Source: [https://github.com/lmdbjava/lmdbjava/issues/116]
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And it looks like a better option would be to add the flag --release 8 to javac when building. Source: plasma-umass/doppio#497 |
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This might be it. The deploy stage in Travis basically builds the whole distribution from scratch (which is another problem of its own) using JDK 11 (e.g. https://travis-ci.org/oracle/opengrok/jobs/548094045 for 1.2.15). Curiously, Maven's has the |
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I changed the deploy build in cset 54bbf93, will trigger new release. |
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relevant comment on the setting the compile target: plasma-umass/doppio#497 (comment) |
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It seems the ultimate cure for this problem is to use |
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@Conan-Kudo , @IamTHEvilONE, @carbonrobin once 1.2.16 is out please give it a try. |
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I have no parallel-indexing errors on 1.2.16 on a single source code repo, nor MappedByteBuffer errors. Testing with my 12+ code bases I'd index. |
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It seems to be okay for me so far... |
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Cool, closing then. Many thanks @carbonrobin ! |
I'm trying to run OpenGrok 1.2.14 on Ubuntu 16.04 on Java 8 using the system provided Java 8 and Tomcat 8 stack.
When running the indexer, I got the following tracebacks:
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