Our app is using the chilkat library for downloading files from FTP/SFTP and when it comes to huge file like 1 GB, we see the below error but for smaller file it works. The FTP server is Windows based. For the same file, if we use AndFTP apk, it does download the file completely.
We want to confirm if there is any setting that needs to be changed on the FTP server or is there any config to be done on the client side to resolve the issue.
06-29 08:44:30.363 E/A(10391): GetFile:
06-29 08:44:30.363 E/A(10391): DllDate: May 7 2019
06-29 08:44:30.363 E/A(10391): ChilkatVersion: 9.5.0.78
06-29 08:44:30.363 E/A(10391): UnlockPrefix: VMWRKM.CB4062020
06-29 08:44:30.363 E/A(10391): Architecture: Little Endian; 64-bit
06-29 08:44:30.363 E/A(10391): Language: Android Java
06-29 08:44:30.363 E/A(10391): VerboseLogging: 0
06-29 08:44:30.363 E/A(10391): originalGreeting: 220 Microsoft FTP Service
06-29 08:44:30.363 E/A(10391): remotePath: PFILES/ASRampServiceOreo_1/FPU_ATLAS_02-13-15.00-ON-U08-STD.zip
06-29 08:44:30.363 E/A(10391): localPath: /sdcard/FPU_ATLAS_02-13-15.00-ON-U08-STD.zip
06-29 08:44:30.363 E/A(10391): ProgressMonitoring:
06-29 08:44:30.363 E/A(10391): enabled: yes
06-29 08:44:30.363 E/A(10391): heartbeatMs: 0
06-29 08:44:30.363 E/A(10391): sendBufferSize: 65536
06-29 08:44:30.363 E/A(10391): --ProgressMonitoring
06-29 08:44:30.363 E/A(10391): autoGetSizeForProgress:
06-29 08:44:30.363 E/A(10391): getSize64ByName:
06-29 08:44:30.363 E/A(10391): sizeCmd:
06-29 08:44:30.363 E/A(10391): sizeCmdInner:
06-29 08:44:30.363 E/A(10391): simpleCommand:
06-29 08:44:30.363 E/A(10391): sendCommand:
06-29 08:44:30.363 E/A(10391): sendingCommand: SIZE PFILES/ASRampServiceOreo_1/FPU_ATLAS_02-13-15.00-ON-U08-STD.zip
06-29 08:44:30.363 E/A(10391): --sendCommand
06-29 08:44:30.363 E/A(10391): readCommandResponse:
06-29 08:44:30.363 E/A(10391): replyLineQP: 213 1059949952
06-29 08:44:30.363 E/A(10391): --readCommandResponse
06-29 08:44:30.363 E/A(10391): --simpleCommand
06-29 08:44:30.363 E/A(10391): --sizeCmdInner
06-29 08:44:30.363 E/A(10391): --sizeCmd
06-29 08:44:30.363 E/A(10391): --getSize64ByName
06-29 08:44:30.363 E/A(10391): --autoGetSizeForProgress
06-29 08:44:30.363 E/A(10391): downloadToFile:
06-29 08:44:30.363 E/A(10391): localFilePath: /sdcard/FPU_ATLAS_02-13-15.00-ON-U08-STD.zip
06-29 08:44:30.363 E/A(10391): Replacing existing local file
06-29 08:44:30.363 E/A(10391): downloadToOutput2:
06-29 08:44:30.363 E/A(10391): modeZ: 0
06-29 08:44:30.363 E/A(10391): binaryMode: 1
06-29 08:44:30.363 E/A(10391): setupDataConnection:
06-29 08:44:30.363 E/A(10391): passive transfer mode
06-29 08:44:30.363 E/A(10391): setupPassiveDataSocket:
06-29 08:44:30.363 E/A(10391): sendCommand:
06-29 08:44:30.363 E/A(10391): sendingCommand: PASV
06-29 08:44:30.363 E/A(10391): --sendCommand
06-29 08:44:30.363 E/A(10391): readCommandResponse:
06-29 08:44:30.363 E/A(10391): replyLineQP: 227 Entering Passive Mode (52,191,166,243,234,205).
06-29 08:44:30.363 E/A(10391): --readCommandResponse
06-29 08:44:30.363 E/A(10391): dataConnect:
06-29 08:44:30.363 E/A(10391): hostname: 52.191.166.243
06-29 08:44:30.363 E/A(10391): port: 60109
06-29 08:44:30.363 E/A(10391): socketOptions:
06-29 08:44:30.363 E/A(10391): SO_SNDBUF: 524288
06-29 08:44:30.363 E/A(10391): SO_RCVBUF: 4194304
06-29 08:44:30.363 E/A(10391): TCP_NODELAY: 1
06-29 08:44:30.363 E/A(10391): SO_KEEPALIVE: 0
06-29 08:44:30.363 E/A(10391): --socketOptions
06-29 08:44:30.363 E/A(10391): dataConnectSuccess: 1
06-29 08:44:30.363 E/A(10391): --dataConnect
06-29 08:44:30.363 E/A(10391): --setupPassiveDataSocket
06-29 08:44:30.363 E/A(10391): --setupDataConnection
06-29 08:44:30.363 E/A(10391): sendCommand:
06-29 08:44:30.363 E/A(10391): sendingCommand: RETR PFILES/ASRampServiceOreo_1/FPU_ATLAS_02-13-15.00-ON-U08-STD.zip
06-29 08:44:30.363 E/A(10391): --sendCommand
06-29 08:44:30.363 E/A(10391): readCommandResponse:
06-29 08:44:30.363 E/A(10391): replyLineQP: 125 Data connection already open; Transfer starting.
06-29 08:44:30.363 E/A(10391): --readCommandResponse
06-29 08:44:30.363 E/A(10391): downloadRate: 2406259
06-29 08:44:30.363 E/A(10391): totalNumBytesReceived: 1059949952
06-29 08:44:30.363 E/A(10391): receiveTimeMs: Elapsed time: 440497 millisec
06-29 08:44:30.363 E/A(10391): readCommandResponse:
06-29 08:44:30.363 E/A(10391): Failed to read FTP control channel reply.
06-29 08:44:30.363 E/A(10391): readFtpReply: Socket operation timeout.
06-29 08:44:30.363 E/A(10391): --readCommandResponse
06-29 08:44:30.363 E/A(10391): No final status reply.
06-29 08:44:30.363 E/A(10391): --downloadToOutput2
06-29 08:44:30.363 E/A(10391): downloadToOutput: Elapsed time: 500989 millisec
06-29 08:44:30.363 E/A(10391): --downloadToFile
06-29 08:44:30.363 E/A(10391): Failed.
06-29 08:44:30.363 E/A(10391): --GetFile
06-29 08:44:30.363 E/A(10391): --ChilkatLog
06-29 08:44:30.363 E/A(10391):
06-29 08:44:30.364 I/A_FtpDownloadHandler(10391): Download failed: FPU_ chilkat TLAS_02-13-15.00-ON-U08-STD.zip```
