[#25582] Use a Pathing Jar instead of long command line class paths in Java Boot loader. #26087

lostluck · 2023-04-04T03:23:12Z

Jars are recursive! If the manifest of one contains a manifest with a class path attribute, the JVM will load those jars. This gets around long jar sequences that can make an argument list too long.

This PR fixes an unchanged test in the Java boot_test.go, as well as adds a unit test for the pathing jar. Further, adds the container tests to the Go Tests github action, so this error doesn't recur.

Fixes #25582.

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lostluck · 2023-04-04T03:32:28Z

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github-actions · 2023-04-04T04:04:42Z

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damccorm

LGTM

damccorm · 2023-04-04T13:41:19Z

.github/workflows/go_tests.yml

@@ -48,7 +48,7 @@ jobs:
      - name: Delete old coverage
        run: "cd sdks/go/pkg && rm -rf .coverage || :"
      - name: Run coverage
-        run: cd sdks/go/pkg && go test -coverprofile=coverage.txt -covermode=atomic ./...
+        run: cd sdks && go test -coverprofile=coverage.txt -covermode=atomic ./go/pkg/... ./go/container/... ./java/container/... ./python/container/... ./typescript/container/...


Question: does codecov count uncovered non-go files (e.g. https://github.com/apache/beam/blob/master/sdks/java/container/license_scripts/pull_licenses_java.py)? I'm wondering if it makes sense to run container tests separately outside of the context of codecov (I'm leaning towards thinking that they should be included so this is probably a no-op).

It will ignore those files, because it's unaware of files that don't receive any coverage numbers/changes.

I think we also don't have the covbot enabled for these directories either. But I'm less concerned about that than I am about the unit tests being run at all.

Enabling covbot here would be out of scope for this change I think. The go tests is different because it's otherwise hard to ensure an action will run, without having a change that ensures the action runs and that was fixing a clear gap.

SGTM - was meant to be nonblocking, but I realize now I didn't specify that

bvolpato · 2023-04-04T19:45:40Z

sdks/java/container/pathingjar.go

+	zf.Write([]byte("Manifest-Version: 1.0\n"))
+	zf.Write([]byte("Class-Path: " + strings.Join(classpaths, " ")))


nit: We could use Created-By: xyz to be able to trace back from a JAR to this pathing code

lostluck · 2023-04-04T20:13:32Z

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lostluck · 2023-04-07T19:57:03Z

I had misunderstood something in my earlier research: The classpath appends are URIs, not file paths. URIs are in a format like :. In this case since it should be all jar files, the class paths should be prefixed with file:.

lostluck · 2023-04-07T20:06:39Z

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lostluck · 2023-04-11T16:40:41Z

Apparently line lengths can't exceed 72 bytes. The more you know! Not hard to fix though (and validate in testing).

And I was missing some line breaks.

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…aths in Java Boot loader. (apache#26087)

lostluck added 2 commits April 2, 2023 15:51

Use a Pathing Jar instead of long class paths.

4942059

Ensure boot.go container changes trigger go tests action.

f6a3d72

github-actions bot added build docker java labels Apr 4, 2023

lostluck changed the title ~~[#25582] Use a Pathing Jar instead of long class paths in Java Boot loader.~~ [#25582] Use a Pathing Jar instead of long command line class paths in Java Boot loader. Apr 4, 2023

github-actions bot added the Next Action: Reviewers label Apr 4, 2023

damccorm approved these changes Apr 4, 2023

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bvolpato reviewed Apr 4, 2023

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bvolpato approved these changes Apr 4, 2023

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lostluck added 2 commits April 4, 2023 13:09

Add comments for pathingjar.

7ffa7c2

Only set classpath once.

fb2c1c1

lostluck added 2 commits April 7, 2023 12:53

URIs are a prefixed scheme.

18b4af5

Add comment about URIs

3d0a61d

Correct max line length length.

4b35162

lostluck merged commit e0e1398 into apache:master Apr 11, 2023

lostluck added a commit to lostluck/beam that referenced this pull request Apr 12, 2023

[apache#25582] Use a Pathing Jar instead of long command line class p…

26bfbba

…aths in Java Boot loader. (apache#26087)

jakubrauch pushed a commit to jakubrauch/beam that referenced this pull request Apr 27, 2023

[apache#25582] Use a Pathing Jar instead of long command line class p…

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…aths in Java Boot loader. (apache#26087)

rezarokni pushed a commit to rezarokni/beam that referenced this pull request May 22, 2023

[apache#25582] Use a Pathing Jar instead of long command line class p…

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…aths in Java Boot loader. (apache#26087)

lostluck mentioned this pull request May 25, 2023

Fix Go Code Coverage. #26885

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[#25582] Use a Pathing Jar instead of long command line class paths in Java Boot loader. #26087

[#25582] Use a Pathing Jar instead of long command line class paths in Java Boot loader. #26087

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		zf.Write([]byte("Manifest-Version: 1.0\n"))
		zf.Write([]byte("Class-Path: " + strings.Join(classpaths, " ")))

[#25582] Use a Pathing Jar instead of long command line class paths in Java Boot loader. #26087

[#25582] Use a Pathing Jar instead of long command line class paths in Java Boot loader. #26087

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