Clone idgen field too
@ -445,6 +445,7 @@ func (ecf ExternalCmdFilter) Clone() LineFilter {
args: ecf.args,
cmd: ecf.cmd,
enableSep: ecf.enableSep,
idgen: ecf.idgen,
name: ecf.name,
outCh: pipeline.OutputChannel(make(chan interface{})),
thresholdBufsiz: ecf.thresholdBufsiz,