https://community.cloudera.com/t5/Support-Questions/Can-not-start-secure-datanode-can-not-find-JSVC-daemon/m-p/183810#M145970 <P>I finally solved it by myself by not using JSVC but using SASL instead as described in the <A href="https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-common/SecureMode.html#Secure_DataNode">official Apache documentation</A> and in the <A href="https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.4.0/bk_hdfs_admin_tools/content/configuring_datanode_sasl.html">HWX docu</A>.</P><P>I've created a single node Hadoop cluster using Docker which is on <A href="https://github.com/Knappek/docker-hadoop-secure">Github</A> and <A href="https://hub.docker.com/r/knappek/hadoop-secure/">Dockerhub</A>.</P> Mon, 19 Jun 2017 12:47:58 GMT andreas_knapp 2017-06-19T12:47:58Z https://community.cloudera.com/t5/Support-Questions/Can-not-start-secure-datanode-can-not-find-JSVC-daemon/m-p/183809#M145969 <P> I have set up a single node Hadoop cluster (not HDP) where I want to enable Kerberos. Namenode and secondary Namenode start fine, but Datanode does not start. </P><P> I try to start it via JSVC. When executing "start-secure-dns.sh" to start Datanode in a secure mode I don't get an output and it also does not log to the datanode log file. But I can see the following in "jsvc.err":</P><PRE>23/05/2017 01:12:59 1279 jsvc.exec error: Cannot find daemon loader org/apache/commons/daemon/support/DaemonLoader 23/05/2017 01:12:59 1257 jsvc.exec error: Service exit with a return value of 1 </PRE><P>I have installed JSVC via paket manager with "yum install jsvc" and I export the JSVC_HOME properly (I verified this by setting a wrong JSVC_HOME where I get an error when executing the starting script).</P><P>Did I install jsvc incorrectly?</P> Wed, 24 May 2017 03:08:06 GMT https://community.cloudera.com/t5/Support-Questions/Can-not-start-secure-datanode-can-not-find-JSVC-daemon/m-p/183809#M145969 andreas_knapp 2017-05-24T03:08:06Z https://community.cloudera.com/t5/Support-Questions/Can-not-start-secure-datanode-can-not-find-JSVC-daemon/m-p/183810#M145970 <P>I finally solved it by myself by not using JSVC but using SASL instead as described in the <A href="https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-common/SecureMode.html#Secure_DataNode">official Apache documentation</A> and in the <A href="https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.4.0/bk_hdfs_admin_tools/content/configuring_datanode_sasl.html">HWX docu</A>.</P><P>I've created a single node Hadoop cluster using Docker which is on <A href="https://github.com/Knappek/docker-hadoop-secure">Github</A> and <A href="https://hub.docker.com/r/knappek/hadoop-secure/">Dockerhub</A>.</P> Mon, 19 Jun 2017 12:47:58 GMT https://community.cloudera.com/t5/Support-Questions/Can-not-start-secure-datanode-can-not-find-JSVC-daemon/m-p/183810#M145970 andreas_knapp 2017-06-19T12:47:58Z