I've been trying to install CDS 2.3.4(SPARK2_ON_YARN-2.3.0.cloudera4) on my cluster with CM-5.13.1 + CDH5.13.1, the SPARK2 parcel distributed successfully but activated hung there, what could I do to continue the installation, or how to rollback it ? Appreciate your help!     My environment, CM-5.13.1 CDH-5.13.1 installed with parcels JDK-1.8.0_144 Python2.7 Scala-2.11   SPARK2 csd file and parcel file here， [root@vm ~]# ls -ltr /opt/cloudera/csd/ total 28 -rw-r--r--. 1 root root 19037 Apr 3 13:58 SPARK2_ON_YARN-2.3.0.cloudera4.jar [root@vm ~]# [root@vm ~]# ls -ltr /opt/cloudera/parcel-repo/ total 2140796 -rw-r--r--. 1 root root 191904064 Apr 3 13:57 SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179-el7.parcel -rw-r--r--. 1 root root 41 Apr 3 13:57 SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179-el7.parcel.sha -rw-r--r--. 1 root root 5171 Apr 3 13:57 manifest.json -rw-r-----. 1 root root 7521 Apr 3 14:00 SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179-el7.parcel.torrent [root@vm ~]# I've tried the uninstallation steps to rollback the installation, but the SPARK2 parcel always stayed there hung at activated status, what could I do next? Need your help, thanks.  ... View more