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https://issues.apache.org/jira/browse/DAEMON-355?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Thomas resolved DAEMON-355.
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Resolution: Not A Problem
This is working as designed.
> the process created by jsvc can't read some os file like /proc/[pid]/io
> -----------------------------------------------------------------------
>
> Key: DAEMON-355
> URL: https://issues.apache.org/jira/browse/DAEMON-355
> Project: Commons Daemon
> Issue Type: Bug
> Components: Jsvc
> Affects Versions: 1.0.13
> Environment: SUSE Linux Enterprise Server 11 SP3 (x86_64) - Kernel
> Reporter: 胡晓东
>
> I started hadoop hdfs with jsvc by root.
> command is:
> exec "$JSVC" \
> -Dproc_$COMMAND -outfile "$JSVC_OUTFILE" \
> -errfile "$JSVC_ERRFILE" \
> -pidfile "$HADOOP_SECURE_DN_PID" \
> -nodetach \
> -user "$HADOOP_SECURE_DN_USER" \
> -cp "$CLASSPATH" \
> $JAVA_HEAP_MAX $HADOOP_OPTS \
> org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter "$@".
> the parameter $HADOOP_SECURE_DN_USER is hdfs.
> Then there will be to proceses in the system.one is owned by root, another is
> owned by hdfs, but the process of hdfs can not read /proc/[pid]/io file,
> because this file is owned by root.
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