PyLucene org.apache.lucene.benchmark is missing

ghz 13hours ago ⋅ 4 views

i just installed PyLucene 4.9 (and also tried with 4.8) via Makefile on Ubuntu 14.04, everything is running fine except that i am missing the modules in org.apache.lucene.benchmark.

The PyLucene documentation says it's there: PyLucene Documentation

But when i open up ipython and tab through "from org.apache.lucene." i only get these results from autocomplete:

In [3]: from org.apache.lucene.
org.apache.lucene.analysis     org.apache.lucene.queries
org.apache.lucene.codecs       org.apache.lucene.queryparser
org.apache.lucene.collation    org.apache.lucene.sandbox
org.apache.lucene.document     org.apache.lucene.search
org.apache.lucene.expressions  org.apache.lucene.store
org.apache.lucene.facet        org.apache.lucene.util
org.apache.lucene.index

So i am assuming something went wrong with my installation but i cannot figure it out. Has anyone experienced this kind of problem and may be able to help?

Answer

It seems like you're experiencing an issue where the org.apache.lucene.benchmark modules are missing from your PyLucene installation. This is not uncommon, and it may be due to a few reasons, such as incorrect installation or missing dependencies during the build process.

Here are a few steps you can take to troubleshoot and potentially resolve the issue:

1. Check PyLucene Version and Build Configuration

The org.apache.lucene.benchmark package is part of the larger Lucene library, but it’s typically bundled with the benchmarking modules (lucene-benchmark). If you’re using a custom build of PyLucene, it’s possible that the benchmarking module was not included during the build process.

  • Check the lucene.benchmark module availability: You should ensure that the benchmarking module is included in the build process. During the installation or build, it’s possible that certain parts of the Lucene library were excluded or not properly compiled.

2. Rebuild PyLucene with lucene-benchmark Included

It’s possible that the lucene-benchmark module was not built during your initial PyLucene installation. To rebuild PyLucene with the benchmarking module, follow these steps:

  1. Download Lucene Benchmarking Module (if not already included): The benchmarking package may not have been part of the Lucene distribution you downloaded. If you have a clean Lucene source, make sure you include the lucene-benchmark module in your build configuration.

    Ensure that the Lucene lucene-benchmark module is properly downloaded. You can get the latest version of Lucene from the Apache Lucene website.

  2. Reconfigure PyLucene Build: When you configure the PyLucene build via the Makefile, ensure that the lucene-benchmark module is included by checking your Makefile settings or build options. Sometimes, you need to pass extra flags or configure options to include certain parts of Lucene (like the benchmarking utilities).

  3. Rebuild PyLucene: After ensuring the lucene-benchmark module is available, rebuild PyLucene using the Makefile again. Make sure that there are no errors related to the benchmarking modules during the build process.

    make clean
make
sudo make install

3. Check for Correct Installation Paths

After rebuilding, check if the benchmarking module appears in the correct location in your Python environment. For example, check the path where org.apache.lucene is installed and ensure the benchmark package is inside the lucene folder.

You can check the installed packages in Python using:

import org.apache.lucene
print(dir(org.apache.lucene))

You should see benchmark listed in the available modules if the installation was successful.

4. Ensure Correct Version of PyLucene

PyLucene is often tightly coupled with a specific version of Lucene. Make sure that the version of PyLucene you installed matches the version of Lucene you downloaded and are building from.

The version mismatch can cause discrepancies in available modules. For example, if you're using PyLucene 4.9, you need to ensure that the version of Lucene you're using also supports the benchmark package.

5. Check PyLucene Dependencies

If you’re missing a dependency or if there are certain JAR files missing, the build might fail to include the benchmark package. PyLucene relies on a number of Java libraries (JAR files), and if these aren't included in your classpath or aren't available, you might not get the complete set of modules.

Ensure that the following JARs are present in your lucene/lib directory (or wherever you have your Lucene libraries stored):

  • lucene-core-X.Y.Z.jar
  • lucene-queries-X.Y.Z.jar
  • lucene-benchmark-X.Y.Z.jar

6. Check for Missing Dependencies in the Build Output

If there are missing dependencies or build issues, they might not always stop the process but can result in missing modules. Check the make output for any warnings or errors related to missing files or dependencies, and ensure that your environment has all the required libraries for PyLucene to function properly.

7. Manually Include Benchmark Module (as a last resort)

If you’ve verified that the lucene-benchmark module exists in your Lucene installation but it's not appearing in your PyLucene installation, you can attempt to manually include it in your Python path or copy the required JAR files into your classpath manually.

Final Thoughts

PyLucene's integration with the underlying Lucene library can sometimes be tricky, especially when building from source or when certain modules aren't bundled by default. Rebuilding PyLucene with the correct configuration and ensuring that the lucene-benchmark module is properly included should solve the issue. If you continue to experience difficulties, consider reaching out to the PyLucene mailing list or community for additional support.

#py