https://community.cloudera.com/t5/Support-Questions/Nifi-error-Malformed-input-or-input-contains-unmappable/m-p/197453#M159504 <P>@Ahmad Debbas</P><P>You shouldn't lose FlowFiles which are in queues as the attributes themselves are stored in FlowFile repository and content in content repository. What you see in the queue is just a reference which will be restored after the restart.</P><P>You can find additional information in below link</P><P><A href="https://nifi.apache.org/docs/nifi-docs/html/nifi-in-depth.html" target="_blank">https://nifi.apache.org/docs/nifi-docs/html/nifi-in-depth.html</A></P> Thu, 17 May 2018 20:47:47 GMT vnittala 2018-05-17T20:47:47Z