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https://issues.apache.org/jira/browse/FLINK-5817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869687#comment-15869687
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Stephan Ewen commented on FLINK-5817:
-------------------------------------
I would encourage you to use the JUnit tool to create random temporary folders:
{code}
@Rule
public final TemporaryFolder tmp = new TemporaryFolder();
{code}
Have a look at the {{org.apache.flink.util.FileUtilsTest}} for an example.
> Fix test concurrent execution failure by test dir conflicts.
> ------------------------------------------------------------
>
> Key: FLINK-5817
> URL: https://issues.apache.org/jira/browse/FLINK-5817
> Project: Flink
> Issue Type: Bug
> Reporter: Wenlong Lyu
> Assignee: Wenlong Lyu
>
> Currently when different users build flink on the same machine, failure may
> happen because some test utilities create test file using the fixed name,
> which will cause file access failing when different user processing the same
> file at the same time.
> We have found errors from AbstractTestBase, IOManagerTest, FileCacheTest.
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