adoroszlai opened a new pull request, #6353:
URL: https://github.com/apache/hadoop/pull/6353
## What changes were proposed in this pull request?
Fix:
```
ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification (ArrayList.java:1013)
at java.util.ArrayList$Itr.next (ArrayList.java:967)
at org.apache.hadoop.maven.plugin.util.Exec.run (Exec.java:77)
at org.apache.hadoop.maven.plugin.util.Exec.run (Exec.java:52)
at
org.apache.hadoop.maven.plugin.versioninfo.VersionInfoMojo.determineSCM
(VersionInfoMojo.java:115)
at org.apache.hadoop.maven.plugin.versioninfo.VersionInfoMojo.execute
(VersionInfoMojo.java:80)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
(DefaultBuildPluginManager.java:137)
```
which is possible if the process exits with error:
```
[INFO] --- hadoop-maven-plugins:3.3.6:version-info (version-info) @
ozone-common ---
[WARNING] [git, branch] failed with error code 128
...
[INFO] BUILD FAILURE
...
[ERROR] Failed to execute goal
org.apache.hadoop:hadoop-maven-plugins:3.3.6:version-info (version-info) on
project ozone-common: java.util.ConcurrentModificationException
```
which happens when building sources from tarball, not from git repo.
https://issues.apache.org/jira/browse/HADOOP-19011
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