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https://issues.apache.org/jira/browse/HADOOP-16400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16873884#comment-16873884
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luhuachao commented on HADOOP-16400:
------------------------------------
fix a code problem and upgrade clover version to 4.0.6
> clover task failed
> ------------------
>
> Key: HADOOP-16400
> URL: https://issues.apache.org/jira/browse/HADOOP-16400
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: luhuachao
> Priority: Major
> Attachments: HADOOP-16400.patch
>
>
> ERROR when exec 'mvn clover2:setup test clover2:aggregate clover2:clover' in
> hadoop-common cause task failed, below is the info
>
> {code:java}
> [WARNING] Some messages have been simplified; recompile with -Xdiags:verbose
> to get full output
> [INFO] 42 warnings
> [INFO] -------------------------------------------------------------
> [INFO] -------------------------------------------------------------
> [ERROR] COMPILATION ERROR :
> [INFO] -------------------------------------------------------------
> [ERROR]
> /data4/luhuachao/opensource/hadoop-git/hadoop/hadoop-common-project/hadoop-common/target/clover/src-instrumented/org/apache/hadoop/fs/Options.java:[349,52]
> reference to resolve is ambiguous
> both method
> resolve(org.apache.hadoop.fs.FileSystem,org.apache.hadoop.fs.Options.HandleOpt...)
> in org.apache.hadoop.fs.Options.HandleOpt and method
> resolve(java.util.function.BiFunction<org.apache.hadoop.fs.FileStatus,org.apache.hadoop.fs.Options.HandleOpt[],org.apache.hadoop.fs.PathHandle>,org.apache.hadoop.fs.Options.HandleOpt...)
> in org.apache.hadoop.fs.Options.HandleOpt match
> [ERROR]
> /data4/luhuachao/opensource/hadoop-git/hadoop/hadoop-common-project/hadoop-common/target/clover/src-instrumented/org/apache/hadoop/fs/Options.java:[349,94]
> incompatible types: cannot infer type-variable(s) I,T
> (argument mismatch; java.lang.Object is not a functional interface)
> [ERROR]
> /data4/luhuachao/opensource/hadoop-git/hadoop/hadoop-common-project/hadoop-common/target/clover/src-instrumented/org/apache/hadoop/security/RuleBasedLdapGroupsMapping.java:[80,157]
> incompatible types: inference variable T has incompatible bounds
> equality constraints: java.lang.String
> lower bounds: java.lang.Object
> [ERROR]
> /data4/luhuachao/opensource/hadoop-git/hadoop/hadoop-common-project/hadoop-common/target/clover/src-instrumented/org/apache/hadoop/security/RuleBasedLdapGroupsMapping.java:[83,157]
> incompatible types: inference variable T has incompatible bounds
> equality constraints: java.lang.String
> lower bounds: java.lang.Object
> [ERROR]
> /data4/luhuachao/opensource/hadoop-git/hadoop/hadoop-common-project/hadoop-common/target/clover/src-instrumented/org/apache/hadoop/io/erasurecode/CodecRegistry.java:[123,11]
> no suitable method found for
> collect(java.util.stream.Collector<java.lang.CharSequence,capture#1 of
> ?,java.lang.String>)
> method
> java.util.stream.Stream.<R>collect(java.util.function.Supplier<R>,java.util.function.BiConsumer<R,?
> super java.lang.Object>,java.util.function.BiConsumer<R,R>) is not applicable
> (cannot infer type-variable(s) R
> (actual and formal argument lists differ in length))
> method java.util.stream.Stream.<R,A>collect(java.util.stream.Collector<?
> super java.lang.Object,A,R>) is not applicable
> (cannot infer type-variable(s) R,A
> (argument mismatch;
> java.util.stream.Collector<java.lang.CharSequence,capture#1 of
> ?,java.lang.String> cannot be converted to java.util.stream.Collector<? super
> java.lang.Object,A,R>))
> [INFO] 5 errors
> {code}
>
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