Bitbucket could not be started due to java.nio.file.FileAlreadyExistsException
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Summary
Bitbucket is not able to start and has this error "SpringMVC dispatcher [springMvc] could not be started" in the logs.
Environment
Bitbucket 7.21.4
Diagnosis
During Bitbucket startup, after it acquires lock on Bitbucket home directory, it fails to start while creating temporary files and the error below is seen in the Bitbucket logs.
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2023-02-04 18:53:36,918 ERROR [spring-startup] c.a.j.s.w.s.JohnsonDispatcherServlet SpringMVC dispatcher [springMvc] could not be started
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'gitHookInstaller' defined in com.atlassian.stash.internal.scm.git.GitWiring$LocalWiring: Invocation of init method failed; nested exception is java.nio.file.FileAlreadyExistsException: BITBUCKET_HOME/shared/config/git/hooks/pack-objects.tmp -> /BITBUCKET_HOME/shared/config/git/hooks/tmp-xxx-pack-objects.tmp
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Caused by: java.nio.file.FileAlreadyExistsException: BITBUCKET_HOME/shared/config/git/hooks/pack-objects.tmp -> BITBUCKET_HOME/shared/config/git/hooks/tmp-xxx-pack-objects.tmp
Cause
On startup, Bitbucket acquires a lock on the home directory, creates temporary files (one among them is git hook script temp files) which are usually deleted automatically on graceful shutdown. However, these tmp files were not deleted during shutdown. During startup, Bitbucket complained that a file already exists at the specific location and failed to start.
Solution
Delete the BITBUCKET_HOME/shared/config/git/hooks/pack-objects.tmp file and start Bitbucket.
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