Unable to detect latest Git changes - ssh variant 'simple' does not support setting port

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Problem

Bamboo server unable to detect latest Git changes.

The following appears in the atlassian-bamboo.log

com.atlassian.bamboo.plugins.git.GitCommandException: command /usr/bin/git ls-remote ssh://ed2992ee-7805-434a-b2d6-8532e08d6cba@127.0.0.1:24938/PROJ/repo.git failed with code 128. Working directory was [/atlassian-bamboo-6.3.0/temp]., stderr:
fatal: ssh variant 'simple' does not support setting port
	at com.atlassian.bamboo.plugins.git.GitCommandProcessor.runCommand(GitCommandProcessor.java:689)
	at com.atlassian.bamboo.plugins.git.GitCommandProcessor.getRemoteRefs(GitCommandProcessor.java:478)
	at com.atlassian.bamboo.plugins.git.NativeGitOperationHelper.lambda$getRemoteRefs$1(NativeGitOperationHelper.java:568)
	at com.atlassian.bamboo.util.CallableResultCache$1.load(CallableResultCache.java:38)
	at com.atlassian.bamboo.util.CallableResultCache$1.load(CallableResultCache.java:34)
	at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
	at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
	at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)
	at com.google.common.cache.LocalCache.get(LocalCache.java:3937)
	at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941)
	at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)
	at com.atlassian.bamboo.collections.AlwaysInvalidatingCacheDecorator.get(AlwaysInvalidatingCacheDecorator.java:64)
	at com.atlassian.bamboo.collections.AlwaysInvalidatingCacheDecorator.getUnchecked(AlwaysInvalidatingCacheDecorator.java:125)
	at com.atlassian.bamboo.util.CallableResultCache.call(CallableResultCache.java:141)
	at com.atlassian.bamboo.plugins.git.NativeGitOperationHelper.getRemoteRefs(NativeGitOperationHelper.java:576)
	at com.atlassian.bamboo.plugins.git.NativeGitOperationHelper.resolveBranch(NativeGitOperationHelper.java:528)
	at com.atlassian.bamboo.plugins.git.NativeGitOperationHelper.obtainLatestRevision(NativeGitOperationHelper.java:627)

Diagnosis

Check Git and OpenSSH versions in the machine hosting Bamboo:

git --version
ssh -V

Cause

Git version 2.16.0-rc0 does not work well with OpenSSH version 6.7 or older as stated in this bug report.

Workaround

This will be fixed in Bamboo 6.4: BAM-19646 - Getting issue details... STATUS  in the interim, downgrade Git to a version >= 1.8.1.5 and < 2.16.

Last modified on Jan 29, 2018

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