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https://issues.apache.org/jira/browse/HADOOP-12457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14973988#comment-14973988
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Steve Loughran commented on HADOOP-12457:
-----------------------------------------
this might be a locale issue.
{code}
* by searching for 68–5–99.7 rule. We flag an RPC as slow RPC
{code}
Looking at the line, I think they are long hyphens "—" not minus signs "-"
If you supply a patch to change the symbols I'll +1 it
> [JDK8] Fix compilation of common by javadoc
> -------------------------------------------
>
> Key: HADOOP-12457
> URL: https://issues.apache.org/jira/browse/HADOOP-12457
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Tsuyoshi Ozawa
>
> Delete.java and Server.java cannot be compiled with "unmappable character ofr
> encoding ASCII".
> {quote}
> [javadoc]
> /home/ubuntu/hadoop-dev/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java:416:
> error: unmappable character for encoding ASCII
> [javadoc] * by searching for 68???95???99.7 rule. We flag an RPC as slow
> RPC
> [javadoc] ^
> [javadoc]
> /home/ubuntu/hadoop-dev/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java:416:
> error: unmappable character for encoding ASCII
> [javadoc] * by searching for 68???95???99.7 rule. We flag an RPC as slow
> RPC
> [javadoc] ^
> [javadoc]
> /home/ubuntu/hadoop-dev/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java:416:
> error: unmappable character for encoding ASCII
> [javadoc] * by searching for 68???95???99.7 rule. We flag an RPC as slow
> RPC
> [javadoc] ^
> [javadoc]
> /home/ubuntu/hadoop-dev/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java:416:
> error: unmappable character for encoding ASCII
> [javadoc] * by searching for 68???95???99.7 rule. We flag an RPC as slow
> RPC
> [javadoc] ^
> [javadoc]
> /home/ubuntu/hadoop-dev/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java:416:
> error: unmappable character for encoding ASCII
> [javadoc] * by searching for 68???95???99.7 rule. We flag an RPC as slow
> RPC
> [javadoc] ^
> [javadoc]
> /home/ubuntu/hadoop-dev/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java:416:
> error: unmappable character for encoding ASCII
> [javadoc] * by searching for 68???95???99.7 rule. We flag an RPC as slow
> RPC
> {quote}
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