NiFi MergeContent generating 2 output files instead of 1 file

I'm using

1. GetDateandServer processor to fetch file names ,
2. decompress the files ,
3. remove header using executestreamcommand Process

Command arguments- 1d
Command path- sed 
IgnoreSTDIN_ False​

• MergeContent Processor to merge files

 Merge strategy: Bin-Packing algorithm
    Merge format: Bin concatenation
    Merge data strategy: Do not merge uncommon metadata
    Min no of entries: 180
    Max no of entries: 1000
    Minimum Group Size: 60GB
    Max Bin age: 5 min
    Max no of bins: 1

• UpdateAttribute to Create a files name Compress files
• putHDFS-To put data into HDFSMy problem is after ExecuteStreamcommand Processor is triggered in the queue I could see two positions with same value

  For every half hour I should get 1 output file but I could see 2 files as output. NIFi is running on 3 nodes, and list queue on 2 nodes. Files running on node1 is merged as 1 file and files running on node 2 is fetched as 2nd file so I'm getting 2 files. Could you please let me know how to get one file Thank you in advance for your help

  Note: I have posted the same question previously but I couldn't see it again so I posted again
• @Nifi