@vlundberg This has nothing to do with being installed via Ambari. If the core-site.xml file that is being used by the HDFS processor in NiFi reference a Class which NiFi does not include, you will get a NoClassDef found error. Adding new Class to NiFi's HDFS NAR bundle may be a possibility, but as I am not a developer i can't speak to that. You can always file an Apache Jira against NiFi for this change. https://issues.apache.org/jira/secure/Dashboard.jspa Thanks, Matt ... View more

@Obaid Salikeen Unfortunately the answer is no at this time. NiFi has zookeeper as a dependency in HDF Ambari, so it is installed when the NiFi service is selected. Once NiFi is deployed there is nothing stopping you from updating the NiFi configs via Ambari to point at your existing Zookeeper you already have installed elsewhere. Keep in mind that other service within the HDF Ambari stack also rely on Zookeeper, so you may need to reconfigure them as well. Matt ... View more

@Vinod Chhabria We should try to keep one thread going instead of creating a new "answer" each time. NiFi supports the following browsers: Mozilla Firefox: current & current - 1 Google Chrome: current & current - 1 Microsoft Edge Safari 8 The version of Firefox you are using is pretty old. If you upgrade to the current Firefox version or try using teh current version of Chrome instead, do you still see the same behavior? Thanks, Matt ... View more

@Vinod Chhabria What browser and version are you using? ... View more

Processor have not notion of what processors come before or after them in a dataflow. A processor simply has an establish set of rules governing its configuration. For example: Required properties XYZ must be set, all downstream relationships must be defined, and/or at least one upstream connection must be connected. So in the case of the ReplaceText processor it does not know who the source of the upstream connection is. It simply cares that one exists from which to pull FlowFiles from its queue. ... View more

@Vinod Chhabria What you are trying to do definitely works. What version of NiFi/HDF are you using? Is this a standalone NiFi or a cluster? When you drag the connection from ConsumeKafka to ReplaceText are you seeing any component get highlighted green including the ConsumeKafka processor itself? If so, without letting go of the mouse button drag you cursor back over the ConsumeKafka and then back to the ReplaceText. Did the highlighting of the ConsumeKafka go away? Did ReplaceText now highlight? Thanks, Matt ... View more

Is this a standalone NiFi install or a NifI cluster? ... View more

@Vinod Chhabria Could you elaborate on what you mean by "I am unable to connect ConsumeKafka to ReplaceText." Are you seeing an error when trying to do so? ... View more