The error seems to be provided from nifi-boostrap.log , please check corresponding  nifi-app.log and share for any warning or error leading to stop of nifi service so we can check further and help.   Thank You. ... View more

Specific to NiFi : By default NiFi is not provided as docker image for CDH or CDP , Last docker image for NiFi was published though HDF NiFI https://docs.cloudera.com/HDPDocuments/HDF3/HDF-3.5.2/download/content/downloading-your-software.html that to be run standalone not managed by Ambari or Cloudera Manager.    Thank you. ... View more

Do you see the same error string in nifi-app.log ? or there are any additional information in applogs ? if you see more details, please provide. Are you able to make any changes to flow design ? Can you please permissions and space is fine where flow.xml.gz is placed?   Thank You. ... View more

For Site to Site , NiFi nodes to which data needs to be send or received should be part of polices , proxy and retrieve site-to-site details and send/receive  data  site-to-site. ... View more

Few points when connecting to any DataBase from NiFi  NiFi has Generic controller service named DBCPConnectionPool which used to create connection pool to given database and processors such as ExecuteSQL or  PutSql will use this controller service to obtain connection and run the given queries.   What is needed as minimum prerequisite  to start with DBCPConnectionPool     1. Determine type of Database  2. Determine the JDBC URL syntax supported by Database  3. The Database client Driver which works outside of NiFi to connect to same Database needs to be placed on each NiFi nodes on given location which can be read user who is running NiFi as service    All above needs to be provided by user , if Ucanaccess 5.0.1 client Driver works outside of NiFi then it should work with DBCPConnectionPool as well, Where you are getting this message "Given file does not exist" ? Is client driver is present on NiFi hosts and configured Database Driver Location is correct ? permissions?    You mentioned There is a Cdata driver which works but that is a licensed product" , it works from where ? from NiFi:DBCPConnectionPool?   Thank You.  ... View more

Have you verified if class name "services.LDMService" is present in provided jar file? ... View more

Same Command Arguments are you able to run as user nifi (or the user who is responsible to run nifi service )against  path which is determine by fileslocation outside of nifi at command prompt ? ... View more

Not supported , as ListFTP or ListSFTP works on last modified timestamp to pick newly modified files since it ran before. So, if a file is added with older last modified timestamp than the one which Listftp already picked, then the file won't be picked with listftp logi, max or min file age property does not aline with current listing strategy.  ... View more

In response to your queries :   1,do you konw how to add "Minimum File Age" property in listftp processor ?  Ans : Not supported , as ListFTP or SFTP  works on last modified timestamp to pick newly modified files since it ran before. So, if a file is added with older last modified timestamp than the one which Listftp already picked, then the file won't be picked with listftp logic.  2.  listsftp can connect ftp server ?  i try ,but failed  Ans : Use ListFTP is FTP server is not secure. 3. What is the difference between listftp and listsftp?   We have two type of FTP servers, FTP and SFTP , SFTP uses a secure channel to transfer files while FTP doesn't, thus NiFi has FTP and SFTP processors.    To address your use case "file may be update anytime,  so i need the "Minimum File Age" property like listsftp processor get"   Ans : You need to change/update the logic on how files written at FTP server , If the same files getting updated/appended multiple time assuming write is not completed yet so try to rename the file with specific name pattern after append is completed  and only list/fetch the files which matches with rename pattern using File Filter Regex settings.          ... View more