[
https://issues.apache.org/jira/browse/HDFS-10849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
xiaodong.hu updated HDFS-10849:
-------------------------------
Description:
start datanode with security mode 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 $HADOOP_SECURE_DN_USER is hdfs.
Then there will be 2 proceses in the system.one is owned by root, another is
owned by hdfs. But the process owned by hdfs can not read /proc/[pid]/io file,
because this file is owned by root.
was:
start datanode with security mode.
command is:
exec "$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 $HADOOP_SECURE_DN_USER is hdfs.
Then there will be 2 proceses in the system.one is owned by root, another is
owned by hdfs. But the process owned by hdfs can not read /proc/[pid]/io file,
because this file is owned by root.
> the datanode process created by jsvc can't read some os file like
> /proc/[pid]/io
> --------------------------------------------------------------------------------
>
> Key: HDFS-10849
> URL: https://issues.apache.org/jira/browse/HDFS-10849
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.6.0
> Environment: SUSE Linux Enterprise Server 11 SP3 (x86_64) - Kernel
> Reporter: xiaodong.hu
> Priority: Minor
>
> start datanode with security mode by root.
> command is:
> exec "$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 2 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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