[GitHub] [beam] youngoli commented on pull request #15336: redundant build

[GitBox <gi...@apache.org>]

youngoli commented on pull request #15336:
URL: https://github.com/apache/beam/pull/15336#issuecomment-899808769


   This PR is fixing an issue that occurs when building a container with a clean docker cache. So if you follow these steps you can probably replicate it:
   
   1. Delete `sdks/java/container/build and sdks/java/container/java8/build`. (You might have to avoid some read-only directories, just delete everything else)
   2. Run `./gradlew -Pdocker-pull-licenses :sdks:java:container:java8:docker`. It should fail with a complaint about a missing third_party_license directory.
   3. Run the same command again. It should work this time.
   
   The specific error that it fails with is:
   ```
   Step 13/18 : ADD target/third_party_licenses /opt/apache/beam/third_party_licenses/
   [...]
   ADD failed: stat /var/lib/docker/tmp/docker-builder099525146/target/third_party_licenses: no such file or directory
   ```
   
   I can confirm that making this change fixes the issue on my machine at least.


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