@Alireza Sadeghi You can apply this patch using "patch" command: http://www.tutorialspoint.com/unix_commands/patch.htm 1) Install patch application yum install patch 2) Download patch AMBARI-21263 wget https://issues.apache.org/jira/secure/attachment/12873572/AMBARI-21263.patch 3) Backup serverUpgrade.py file cp /usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py /usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py_org 4) Apply patch patch < AMBARI-21263.patch can't find file to patch at input line 5 Perhaps you should have used the -p or --strip option? The text leading up to this was: -------------------------- |diff --git a/ambari-server/src/main/python/ambari_server/serverUpgrade.py b/ambari-server/src/main/python/ambari_server/serverUpgrade.py |index 160c91d..8263062 100644 |--- a/ambari-server/src/main/python/ambari_server/serverUpgrade.py |+++ b/ambari-server/src/main/python/ambari_server/serverUpgrade.py -------------------------- File to patch: /usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py patching file /usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py 5) Check files differences diff /usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py /usr/lib/python2.6/site-packages/ambari_server/serverUpgrade.py_org ... View more

@Saikrishna Tarapareddy, if you are using NiFi 1.2+ then you can try with ConvertRecord processor instead of ConvertJSONToAvro processor, as ConvertRecord processor takes array of json and converts as avro. Keep convertrecord processor configs record reader as Json reader and writer as avro set writer. ... View more