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Build Identifier: I20110613-1736 I have a branch structure like in the screenshot. If i want to merge the branch production (362055b6) into development (9b016d89), i get the exception with multiple merge-bases. However, if i execute git merge-base production development, i get the commit 9f93c46e as (single) merge-base. Strack trace: org.eclipse.jgit.api.errors.JGitInternalException: Exception caught during execution of merge command. java.io.IOException: Multiple merge bases for: 9b016d8943e230fb0ec9b01c11395d7b15b518e9 362055b678aee1accaab4d2ca788523f1efcf929 found: 9f93c46e5f902ff148a8a968cb5b5ccf8df934ad 36015871c7718b57bc0b33378f031ecc40dc49b6 at org.eclipse.jgit.api.MergeCommand.call(MergeCommand.java:251) at org.eclipse.egit.core.op.MergeOperation$1.run(MergeOperation.java:108) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2326) at org.eclipse.egit.core.op.MergeOperation.execute(MergeOperation.java:128) at org.eclipse.egit.ui.internal.repository.tree.command.MergeCommand$1.run(MergeCommand.java:96) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) Caused by: java.io.IOException: Multiple merge bases for: 9b016d8943e230fb0ec9b01c11395d7b15b518e9 362055b678aee1accaab4d2ca788523f1efcf929 found: 9f93c46e5f902ff148a8a968cb5b5ccf8df934ad 36015871c7718b57bc0b33378f031ecc40dc49b6 at org.eclipse.jgit.merge.Merger.getBaseCommit(Merger.java:214) at org.eclipse.jgit.merge.Merger.mergeBase(Merger.java:179) at org.eclipse.jgit.merge.ThreeWayMerger.mergeBase(ThreeWayMerger.java:146) at org.eclipse.jgit.merge.ResolveMerger.mergeImpl(ResolveMerger.java:186) at org.eclipse.jgit.merge.Merger.merge(Merger.java:156) at org.eclipse.jgit.merge.ThreeWayMerger.merge(ThreeWayMerger.java:133) at org.eclipse.jgit.merge.ThreeWayMerger.merge(ThreeWayMerger.java:126) at org.eclipse.jgit.api.MergeCommand.call(MergeCommand.java:207) ... 6 more Reproducible: Always Steps to Reproduce: 1. Since it's an internal company repository, i cannot publish it. I'll try, if i can produce that history with a test repository 2. 3.
Created attachment 200909 [details] Screenshot with exception and history
Created attachment 203042 [details] Test repository to reproduce the error test repository. To get the error, merge branch master into branch prod with EGit.
It looks like multiple merge bases do exist in the test repository you included. git merge-base -a prod master outputs the same commits that JGit generates an exception for.
can we close this or do you still see a problem here ?
I think the bigger problem is that cgit can create a merge here, but jgit cannot. This is effecting Gerrit as well - see http://code.google.com/p/gerrit/issues/detail?id=1374
Closed as a duplicate of bug 380314, as that one has a better description. *** This bug has been marked as a duplicate of bug 380314 ***