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https://issues.apache.org/jira/browse/HADOOP-13605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15693617#comment-15693617
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Brahma Reddy Battula commented on HADOOP-13605:
-----------------------------------------------
Following test fails after this check-in , Raised HADOOP-13833 to track.
{noformat}
org.junit.ComparisonFailure: expected:<...ileSystem for scheme[: null]> but
was:<...ileSystem for scheme[ "null"]>
at org.junit.Assert.assertEquals(Assert.java:115)
at org.junit.Assert.assertEquals(Assert.java:144)
at
org.apache.hadoop.fs.SymlinkBaseTest.testCreateLinkUsingPartQualPath2(SymlinkBaseTest.java:574)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
{noformat}
*REF:*
https://builds.apache.org/job/hadoop-qbt-trunk-java8-linux-x86/235/testReport/junit/org.apache.hadoop.fs/TestSymlinkHdfsFileSystem/testCreateLinkUsingPartQualPath2/
> Clean up FileSystem javadocs, logging; improve diagnostics on FS load
> ---------------------------------------------------------------------
>
> Key: HADOOP-13605
> URL: https://issues.apache.org/jira/browse/HADOOP-13605
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.8.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Fix For: 2.9.0, 3.0.0-alpha2
>
> Attachments: HADOOP-13605-004.patch, HADOOP-13605-005.patch,
> HADOOP-13605-branch-2-001.patch, HADOOP-13605-branch-2-002.patch,
> HADOOP-13605-branch-2-003.patch
>
>
> We can't easily debug FS instantiation problems as there isn't much detail in
> what was going on.
> We can add more logging, but cannot simply switch {{FileSystem.LOG}} to SLF4J
> —the class is used in too many places, including tests which cast it.
> Instead, add a new private SLF4J Logger, {{LOGGER}} and switch logging to it.
> While working in the base FileSystem class, take the opportunity to clean up
> javadocs and comments
> # add the list of exceptions, including indicating which base classes throw
> UnsupportedOperationExceptions
> # cut bits in the comments which are not true
> The outcome of this patch is that IDEs shouldn't highlight most of the file
> as flawed in some way or another
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