Alexander Schwartz created MWRAPPER-91:
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Summary: Concurrent execution of mvnw to download wrapper fails
Key: MWRAPPER-91
URL: https://issues.apache.org/jira/browse/MWRAPPER-91
Project: Maven Wrapper
Issue Type: Bug
Components: Maven Wrapper Scripts
Affects Versions: 3.1.0
Reporter: Alexander Schwartz
The script will download the executable maven wrapper JAR file directly to the
final file name.
When multiple calls do this concurrently, it happens that the first call
executes the JAR file that is currently overwritten by the second parallel
call.
This leads to error like:
* {{NoClassDefFoundError: org/codehaus/plexus/PlexusContainer}}
* {{ClassNotFoundException: org.apache.maven.wrapper.MavenWrapperMain}}
A different solution might be to first download the JAR file to a temporary
file, and then use an atomic file operator like a rename one the download is
complete.
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