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Update code-change-guide.md #33008

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Update code-change-guide.md
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7 changes: 6 additions & 1 deletion contributor-docs/code-change-guide.md
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Expand Up @@ -145,7 +145,7 @@ in the Google Cloud documentation.

Depending on the languages involved, your `PATH` file needs to have the following elements configured.

* A Java environment that uses a supported Java version, preferably Java 8.
* A Java environment that uses a supported Java version, preferably Java 11.
* This environment is needed for all development, because Beam is a Gradle project that uses JVM.
* Recommended: To manage Java versions, use [sdkman](https://sdkman.io/install).

Expand Down Expand Up @@ -624,6 +624,11 @@ Tips for using the Dataflow runner:

## Appendix

### Common Issues

* If you run into some strange errors such as `java.lang.NoClassDefFoundError`, run `./gradlew clean` first
* To run one single Java test with gradle, use `--tests` to filter, for example, `./gradlew :it:google-cloud-platform:WordCountIntegrationTest --tests "org.apache.beam.it.gcp.WordCountIT.testWordCountDataflow"`

### Directories of snapshot builds

* https://repository.apache.org/content/groups/snapshots/org/apache/beam/ Java SDK build (nightly)
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