If it works in NiFi 1.5 and not in 1.9.2, then the DBCP libraries probably got updated to DBCP 2, where the latter will call isValid() on the connection if a validation query is not set (see https://sourceforge.net/p/jtds/discussion/104388/thread/bbfbcf24/). Have you set the Validation Query property on the DatabaseConnectionPool? If not, set it to "SELECT 1" and try again, hopefully that will work. If that doesn't, you can try adding a user-defined property called "validationQuery" and set it to "SELECT 1". That should add it as a property on the JDBC connection itself. Another workaround would be to use the official SQL Server driver (although I assume you chose jTDS on purpose). ... View more

In nifi-assembly/target you'll find the built system as you mention, including a "conf" folder that contains (among other things) a file called bootstrap.conf. In that file there's a commented out JVM property to enable attachment by a debugger (the preceding line says "Enable Remote Debugging". When you uncomment that argument and start NiFi, it will listen on port 8000 for a debugger to attach. You can then attach a debugger from your IDE (Eclipse, NetBeans, IntelliJ, etc.). You can change the port and/or set "suspend=y" if you want it to wait until a debugger is attached before continuing startup, the latter is helpful if you are debugging something early in the startup sequence. Otherwise you can wait for NiFi to finish starting up and then attach whenever you like. ... View more

You were so close! By using the [] syntax it just adds to the outgoing array, but you wanted to associate them with the same index, namely the one matched by the * "above" the fields. Put #2 inside your braces (#2 is a reference to the array index you're iterating over, "two levels up" from where you are in the spec): [{     "operation": "shift",     "spec": {       "nummer": "Nummer",       "table": {         "*": {           "zn": "Positionen.[#2].ZeileNr",           "datum": "Positionen.[#2].Datum"         }       }     } }] ... View more

This Chain spec will add the hardcoded value 20190905 into the array (after removing empty values): [   {     "operation": "shift",     "spec": {       "color_*": {         "": "TRASH",         "*": {           "$": "colorsLove[].&2"         }       },       "*": "&"     }   },   {     "operation": "shift",     "spec": {       "colorsLove": {         "*": {           "#20190905": "colorsLove[#2].date",           "*": "colorsLove[#2].&"         }       },       "*": "&"     }   },   {     "operation": "remove",     "spec": {       "TRASH": ""     }   } ] You should be able to replace "#20190905" with a NiFi Expression Language statement, maybe something like: "#${now:toNumber():format('yyyyddMM')}" ... but I didn't try that part. ... View more