xiaodong.hu created HDFS-10849:
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Summary: the datanode process created by jsvc can't read some os
file like /proc/[pid]/io
Key: HDFS-10849
URL: https://issues.apache.org/jira/browse/HDFS-10849
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.6.0
Environment: SUSE Linux Enterprise Server 11 SP3 (x86_64) - Kernel
Reporter: xiaodong.hu
Priority: Minor
start datanode with security mode.
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 owned by hdfs can not read /proc/[pid]/io file,
because this file is owned by root.
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