{"record":{"id":"5eac1cf4b391f1b0","repo":"GoogleContainerTools/jib","slug":"failed-to-generate-a-jib-file-map-for-sync-with-sk-5eac1c","errorCode":null,"errorMessage":"Failed to generate a Jib file map for sync with Skaffold","messagePattern":"Failed to generate a Jib file map for sync with Skaffold","errorType":"exception","errorClass":"MojoExecutionException","httpStatus":null,"severity":"error","filePath":"jib-maven-plugin/src/main/java/com/google/cloud/tools/jib/maven/skaffold/SyncMapMojo.java","lineNumber":104,"sourceCode":"\n      MavenRawConfiguration configuration = new MavenRawConfiguration(this);\n\n      try {\n        String syncMapJson =\n            PluginConfigurationProcessor.getSkaffoldSyncMap(\n                configuration,\n                projectProperties,\n                skaffold.sync.excludes.stream()\n                    .map(File::toPath)\n                    .map(Path::toAbsolutePath)\n                    .collect(Collectors.toSet()));\n\n        System.out.println();\n        System.out.println(\"BEGIN JIB JSON: SYNCMAP/1\");\n        System.out.println(syncMapJson);\n\n      } catch (Exception ex) {\n        throw new MojoExecutionException(\n            \"Failed to generate a Jib file map for sync with Skaffold\", ex);\n      }\n    }\n  }\n}\n","sourceCodeStart":86,"sourceCodeEnd":110,"githubUrl":"https://github.com/GoogleContainerTools/jib/blob/fb949e2676afbbd7dd7a1ef61e20251931325654/jib-maven-plugin/src/main/java/com/google/cloud/tools/jib/maven/skaffold/SyncMapMojo.java#L86-L110","documentation":"SyncMapMojo.execute wraps its whole sync-map generation in a catch-all for Exception and rethrows it as a MojoExecutionException. This means any failure while computing the Jib file map (the mapping of build-output files to container paths used by Skaffold's sync feature) surfaces with this generic message; the real cause is in the wrapped exception. The plugin prints the sync map JSON to stdout with a BEGIN JIB JSON: SYNCMAP/1 marker for Skaffold to consume.","triggerScenarios":"Running `mvn jib:_skaffold-sync-map` (or `jib:_skaffold-files-v2`-driven sync) fails while generating the sync map JSON — e.g. the build's output files cannot be resolved, project/artifact processing fails, or any unexpected exception occurs inside execute().","commonSituations":"Using Skaffold with Jib and the Maven project produces unexpected output files or the Mojo cannot enumerate classpath resources; malformed Skaffold/Jib invocation; internal bugs in snapshotting the build output.","solutions":["Read the wrapped `cause` exception in the full Maven stack trace (run with -e / -X) — the generic message always hides the real failure there.","Verify the project builds normally first (`mvn package`) — a broken build output breaks sync-map generation.","Check your Skaffold and jib-maven-plugin versions are compatible; upgrade jib-maven-plugin to the latest release.","If sync is not needed, remove `jib` from skaffold.yaml sync config or use `manual` sync so the sync map is not generated."],"exampleFix":"// before (Symptom: generic MojoExecutionException with unknown cause)\nmvn jib:_skaffold-sync-map\n// after (Reveal the real cause)\nmvn -e jib:_skaffold-sync-map","handlingStrategy":"try-catch","validationCode":"// ensure the project builds before invoking the sync map goal\nmvn -q package -DskipTests || exit 1","typeGuard":null,"tryCatchPattern":"// the real cause is always wrapped; read it\ntry { ... } catch (MojoExecutionException e) {\n  e.getCause().printStackTrace(); // inspect the underlying failure\n}","preventionTips":["Keep Skaffold and jib-maven-plugin versions mutually up to date","Run `mvn package` successfully before Skaffold dev cycles","Read the cause chain with `mvn -e` instead of the headline message"],"tags":["maven","skaffold","jib","build"],"backgroundTag":"maven-mojo-execution-failed","analyzedSha":"fb949e2676afbbd7dd7a1ef61e20251931325654","analyzedAt":"2026-09-06T14:04:09.491Z","contentChangedAt":"2026-09-06T14:04:09.491Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}