APAR status
Closed as program error.
Error description
DB2 Connector on server canvas bulk loaded DECIMAL columns with NULL if ASC file type is used. DB2 load from the fixed length ASC input file expects the data at the position (that specifies the start and end column numbers) from which to load the data. When the data length was single digit or less then the maximum precision, the garbage characters with the actual decimal data was mixed and the NULL was loaded instead. DataStage job log contained: Item #: 406 Event ID: 405 Timestamp: 2017-07-08 18:20:46 Type: Info User Name: dsadm Message Id: IIS-CONN-DB2-00314 Message: DB2CC_bulk_asc..DB2_Connector_2: The DB2 Load API call failed with SQLCODE 3,107. Load messages are stored in message file:loadMsgs.asc. DB2 load message file contained: SQL3123W The field value in row "F0-1" and column "3" cannot be converted to a PACKED DECIMAL value. A null was loaded.
Local fix
Use DEL file type in server job or use parallel job with ASC file type.
Problem summary
**************************************************************** USERS AFFECTED: Users having problems with LOAD to DB2 on z/OS caused by FTP disconnection/timeout. The problem is visible in the job logs as a failed FTP transfer. **************************************************************** PROBLEM DESCRIPTION: When LOADing data to DB2 for z/OS using DB2 Connector with FTP transfer option, the transfer could time out or the connection could be terminated. There can be several reasons for FTP transfer to fail, most of them not related to DB2 connector, for example the file transferred could be so big or the transfer so slow, that the connection could timeout. **************************************************************** RECOMMENDATION: Apply patch JR58027. ****************************************************************
Problem conclusion
As a fix for the problem, usage of LFTP client was implemented in DB2 Connector. LFTP among many options allows to specify network timeout, retry count and reconnect interval. To leverage the various options available in LFTP, user needs to select "lftp" from the "Transfer type" combo box. All the LFTP options can be provided in the "Transfer command" input field. Example options: set ftp:catch-size true; set net:timeout 60; set net:max-retries 10; set net:reconnect-interval-base 5; set net:reconnect-interval-max 20; set net:reconnect-interval-multiplier 1.5; Prerequisites for LFTP "Transfer type" - lftp tool installed / lftp(.exe) on PATH - lftp version >= 4.5.0 (supporting --env-password, allows taking password from LFTP_PASSWORD environment variable) Comparing to FTP "Transfer type", LFTP does not use pipes, it's implementation is similar to SFTP (also FTP on Windows platform). First the data is stored in a file, which is later sent to the DB2 z/OS host. This allows transfer resume. LFTP is not run interactively (like FTP and SFTP), it's run as a one command, DB2 Connectors just runs it and waits for the process to finish. For SFTP/FTP the Connector monitors the output and sends new commands when needed.
Temporary fix
To avoid FTP transfer timeout or disconnect users can: - use SFTP transfer type - increase timeout setting on the server side - increase network throughput - limit network usage during LOAD - split one big LOAD into several smaller ones - rerun the job hoping the timeout won't occur
Comments
APAR Information
APAR number
JR58252
Reported component name
WIS DATASTAGE
Reported component ID
5724Q36DS
Reported release
B50
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-08-08
Closed date
2017-09-05
Last modified date
2017-09-05
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
WIS DATASTAGE
Fixed component ID
5724Q36DS
Applicable component levels
RB50 PSY
UP
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSVSEF","label":"IBM InfoSphere DataStage"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.5","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
Document Information
Modified date:
05 September 2017