Indeed @DigitalPlumber , EvaluateXpath can't handle variables, only an Xpath. Queryrecord might be an alternative if i was using another type of file but since im using an XML file and this processor performs an SQL Query what can be my parameters in the query ?  ... View more

I suspect that your datanodes report is slow.Because after restart of namenode you are trigger the datanode restart so it will take time to come up with reports during that interval you can except for missing blocks this will be an intermediate issue. So that you can wait for few more min's and check the namenode ui. Else during the time of issue copy the logs and share it.   Make sure to mark the answer as the accepted solution. If it resolves your issue ! ... View more

Thank you @GangWar i tried these steps before and turns out that i had been modifying these parameters in the wrong core-site.xml file , it works just fine now 😉 ... View more