WARNING about unknown commit-graph chunk

[khmarbaise]

Describe the bug (required)

[INFO] --- git-commit-id:7.0.0:revision (default) @ tree ---
[WARNING] unknown commit-graph chunk: 0x47444132
[WARNING] unknown commit-graph chunk: 0x47444132
[WARNING] unknown commit-graph chunk: 0x47444132
[WARNING] unknown commit-graph chunk: 0x47444132

Already done a git gc --prune=now etc.

$> git fsck --unreachable 
Checking object directories: 100% (256/256), done.
Checking objects: 100% (3261/3261), done.
Verifying commits in commit graph: 100% (323/323), done.

Tell us about your plugin configuration (required)

        <plugin>
          <groupId>io.github.git-commit-id</groupId>
          <artifactId>git-commit-id-maven-plugin</artifactId>
          <version>7.0.0</version>
          <configuration>
            <failOnNoGitDirectory>false</failOnNoGitDirectory>
            <runOnlyOnce>true</runOnlyOnce>
            <generateGitPropertiesFile>true</generateGitPropertiesFile>
            <commitIdGenerationMode>full</commitIdGenerationMode>
            <useBranchNameFromBuildEnvironment>false</useBranchNameFromBuildEnvironment>
          </configuration>
        </plugin>

Tell us about the Plugin version used (required)

7.0.0

Tell us about the Maven version used (required)

• Maven 4.0.0-alpha-10

Apache Maven 4.0.0-alpha-10 (89d3c0321dda868c432edf504f1884e6fd706f00)
Maven home: /Users/khm/tools/maven
Java version: 21.0.1, vendor: Oracle Corporation, runtime: /Users/khm/.sdkman/candidates/java/21.0.1-open
Default locale: en_DE, platform encoding: UTF-8
OS name: "mac os x", version: "14.0", arch: "aarch64", family: "mac"

• Maven 3.9.6

Apache Maven 3.9.6 (bc0240f3c744dd6b6ec2920b3cd08dcc295161ae)
Maven home: /Users/khm/tools/maven
Java version: 21.0.1, vendor: Oracle Corporation, runtime: /Users/khm/.sdkman/candidates/java/21.0.1-open
Default locale: en_DE, platform encoding: UTF-8
OS name: "mac os x", version: "14.0", arch: "aarch64", family: "mac"

• Maven 3.8.8

mvn --version
Apache Maven 3.8.8 (4c87b05d9aedce574290d1acc98575ed5eb6cd39)
Maven home: /Users/khm/tools/maven
Java version: 21.0.1, vendor: Oracle Corporation, runtime: /Users/khm/.sdkman/candidates/java/21.0.1-open
Default locale: en_DE, platform encoding: UTF-8
OS name: "mac os x", version: "14.0", arch: "aarch64", family: "mac"

Steps to Reproduce (required)

mvn clean verify

Are there any stacktraces or any error messages? (required)

mvn clean verify
...
[INFO] 
[INFO] --- git-commit-id:7.0.0:revision (default) @ tree ---
[INFO] Current project: 'XYZ..', first project to execute based on dependency graph: 'XYZ...'
[INFO] dotGitDirectory '/Users/khm/xyz/.git'
[INFO] Collected git.build.user.name with value 
[INFO] Collected git.build.user.email with value 
[WARNING] unknown commit-graph chunk: 0x47444132
[INFO] Collected git.branch with value main
[INFO] Collected git.commit.id.describe with value 0b93ad0-dirty
[INFO] Collected git.commit.id.describe-short with value 0b93ad0-dirty
[INFO] Collected git.commit.id.full with value 0b93ad0c8c4ebf955108b85d6afda4428a5c11a3
[INFO] Collected git.commit.id.abbrev with value 0b93ad0
[INFO] Collected git.dirty with value true
[INFO] Collected git.commit.user.name with value Karl Heinz Marbaise
[INFO] Collected git.commit.user.email with value kama@soebes.de
[INFO] Collected git.commit.message.full with value Upgrade assertj-bom 3.25.1
[INFO] Collected git.commit.message.short with value Upgrade assertj-bom 3.25.1
[INFO] Collected git.commit.time with value 2024-01-03T17:29:20+0100
[INFO] Collected git.commit.author.time with value 2024-01-03T17:29:20+0100
[INFO] Collected git.commit.committer.time with value 2024-01-03T17:29:20+0100
[INFO] Collected git.remote.origin.url with value git@192.168.178.9:/home/git/repos/xyz.git
[WARNING] unknown commit-graph chunk: 0x47444132
[INFO] Collected git.tags with value 
[WARNING] unknown commit-graph chunk: 0x47444132
[INFO] Collected git.closest.tag.name with value 
[WARNING] unknown commit-graph chunk: 0x47444132
[INFO] Collected git.closest.tag.commit.count with value 
[INFO] Collected git.total.commit.count with value 319
[INFO] Collected git.local.branch.ahead with value 0
[INFO] Collected git.local.branch.behind with value 0
[INFO] Collected git.build.time with value 2024-01-04T11:12:41+0100
[INFO] Collected git.build.version with value 0.2.0-SNAPSHOT
[INFO] Collected git.build.host with value Karl-Heinzs-MacBook-Pro.local
[INFO] including property 'git.tags' in results
[INFO] including property 'git.build.version' in results
[INFO] including property 'git.branch' in results
[INFO] including property 'git.build.host' in results
[INFO] including property 'git.commit.user.email' in results
[INFO] including property 'git.local.branch.behind' in results
[INFO] including property 'git.commit.author.time' in results
[INFO] including property 'git.build.user.name' in results
[INFO] including property 'git.dirty' in results
[INFO] including property 'git.closest.tag.commit.count' in results
[INFO] including property 'git.commit.user.name' in results
[INFO] including property 'git.commit.id.abbrev' in results
[INFO] including property 'git.commit.id.describe-short' in results
[INFO] including property 'git.total.commit.count' in results
[INFO] including property 'git.commit.id.describe' in results
[INFO] including property 'git.build.user.email' in results
[INFO] including property 'git.commit.message.short' in results
[INFO] including property 'git.commit.committer.time' in results
[INFO] including property 'git.commit.id.full' in results
[INFO] including property 'git.closest.tag.name' in results
[INFO] including property 'git.local.branch.ahead' in results
[INFO] including property 'git.commit.time' in results
[INFO] including property 'git.build.time' in results
[INFO] including property 'git.commit.message.full' in results
[INFO] including property 'git.remote.origin.url' in results
[INFO] Writing properties file [/Users/khm/xyz/tree/target/classes/git.properties] (for project XYZ..)...
[INFO] 

Is there a (public) project where this issue can be reproduced? (optional)

I used my public project and applied the same configuration and it produces the same warning:

https://github.com/khmarbaise/maven-it-extension/tree/git-commit-id-maven-plugin-issue-687

Your Environment (optional)

Java version: 21.0.1, vendor: Oracle Corporation, runtime: /Users/khm/.sdkman/candidates/java/21.0.1-open
Default locale: en_DE, platform encoding: UTF-8
OS name: "mac os x", version: "14.0", arch: "aarch64", family: "mac"
also Tested with JDK 17
Java version: 17.0.9, vendor: Eclipse Adoptium, runtime: /Users/khm/.sdkman/candidates/java/17.0.9-tem
Default locale: en_DE, platform encoding: UTF-8
OS name: "mac os x", version: "14.0", arch: "aarch64", family: "mac"

Context (optional)

No response

[TheSnoozer]

Hello,
thanks for this detailed bug report and the reproducer (also thanks for your contributions to the maven ecosystem) :-)

Unfortunately I'm currently unable to reproduce this issue with the repository provided.
I tried various multiple combinations now that would yield the cryptic error in your case:

$ mvn --version
Apache Maven 3.8.8 (4c87b05d9aedce574290d1acc98575ed5eb6cd39)
Maven home: /usr/share/maven-3.8.8
Java version: 21.0.1, vendor: Private Build, runtime: /usr/lib/jvm/java-21-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.15.0-91-generic", arch: "amd64", family: "unix"


$ mvn --version
Apache Maven 3.8.8 (4c87b05d9aedce574290d1acc98575ed5eb6cd39)
Maven home: /usr/share/maven-3.8.8
Java version: 21.0.1, vendor: Oracle Corporation, runtime: /usr/lib/jvm/jdk-21-oracle-x64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.15.0-91-generic", arch: "amd64", family: "unix"


$ mvn --version
Apache Maven 3.9.6 (bc0240f3c744dd6b6ec2920b3cd08dcc295161ae)
Maven home: /usr/share/maven-3.9.6
Java version: 21.0.1, vendor: Private Build, runtime: /usr/lib/jvm/java-21-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.15.0-91-generic", arch: "amd64", family: "unix"


$ mvn --version
Apache Maven 3.9.6 (bc0240f3c744dd6b6ec2920b3cd08dcc295161ae)
Maven home: /usr/share/maven-3.9.6
Java version: 21.0.1, vendor: Oracle Corporation, runtime: /usr/lib/jvm/jdk-21-oracle-x64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.15.0-91-generic", arch: "amd64", family: "unix"

In general your current configuration uses the jgit-implementation. That is more or less git implemented in java.

When searching the jgit repository:
The message templates are defined in:

org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties:commitGraphChunkUnknown=unknown commit-graph chunk: 0x{0}

and the error you observe comes from:
https://github.com/eclipse-jgit/jgit/blob/b1cc74b75b771279d81de15833da514c71513648/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/commitgraph/CommitGraphLoader.java#L194.

I can only speculate about the meaning of this error and hence I have created a bug in the jgit repository (eclipse-jgit/jgit#12).

To avoid this issue you could use the native git binary instead of the java git implementation. To enable the native git binary add <useNativeGit>true</useNativeGit> to the plugin configuration.

I hope this helps.