13.7.2 Troubleshooting in JP1/IM and JP1/Base
System operation management is affected by any failure that causes JP1/IM or JP1/Base to stop. JP1/IM and JP1/Base therefore provides the following functionality to enhance failure tolerance:
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Automatic restart if a process ends abnormally (process management)
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Issuing of a JP1 event when an error is detected during process start or stop processing (process management)
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Issuing of a JP1 event and execution of a notification command when a hangup is detected in a process (health check function)
Consider enabling these functions. They are disabled by default.
- About process error troubleshooting and reporting:
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Process management
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Setting to enable process restart after an error
See Extended startup process definition file (jp1co_service.conf) in Chapter 2. Definition Files in the manual JP1/Integrated Management 2 - Manager Command, Definition File and API Reference.
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Setting to enable issuing of a JP1 event when a process error occurs
See IM parameter definition file (jp1co_param_V7.conf) in Chapter 2. Definition Files in the manual JP1/Integrated Management 2 - Manager Command, Definition File and API Reference.
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Health check function
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Setting to enable issuing of a JP1 event and execution of a notification command on detection of a process hangup
See Health check definition file (jcohc.conf) in Chapter 2. Definition Files in the manual JP1/Integrated Management 2 - Manager Command, Definition File and API Reference.
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JP1/Base troubleshooting and error reporting
See the description of setup for troubleshooting JP1/Base errors in the JP1/Base User's Guide.
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To enable prompt retrieval of relevant information in the event of a failure, JP1/IM provides dump output commands and data collection tools. These are normally used to collect data when a problem occurs in JP1/IM.
- Dump output commands
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JP1/IM - View and JP1/IM - Manager each have their own dump output command.
Table 13‒10: Dump output commands Command
Description
jcothreaddmp
Dump output command for JP1/IM - View.
Outputs the following dump as diagnostic data when a hangup occurs in JP1/IM - View:
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Java thread dump
jcogencore
Dump output command for JP1/IM - Manager.
Outputs the following dump as diagnostic data when a hangup occurs in JP1/IM - Manager processes:
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Java thread dump: Outputs failure data for the evflow, evtcon, evgen, and jcfmain processes.
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Core dump (UNIX only)#: Outputs failure data for the evtcon, evgen, jcamain, evflow, and jcfmain processes.
To check for a process hangup, use the health check function.
#: If the core dump for the four processes excluding jcfmain is output, the total size of core dump might be as much as 8,419 megabytes. If the core dump also includes the jcfmain process, the total size might be as much as 560 + 230 × number-of-jcfallogtrap-processes megabytes. Therefore, check whether disk capacity is sufficient before outputting the dump.
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- Data collection tools
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The data collection tools are provided as a batch files (in Windows) or scripts (in UNIX).
Table 13‒11: Data collection tools provided by JP1/IM OS
Data collection tool
Description
Windows
jcoview_log.bat
Tool for collecting in a batch all data required for error investigation in JP1/IM - View
jim_log.bat
Tool for collecting in a batch all data required for error investigation in JP1/IM - Manager#
UNIX
jim_log.sh
Tool for collecting in a batch all data required for error investigation in JP1/IM - Manager#
#: To collect data for investigating an error in JP1/Base, you must execute the data collection tool provided by JP1/Base. (The JP1/Base data collected by the tools in the above table relates to JP1/IM operation only.)
For details about the collected data, see 11.3 Data that needs to be collected when a problem occurs in the JP1/Integrated Management 2 - Manager Administration Guide. In Windows, a memory dump or crash dump might be required if a problem occurs. We recommend that you set Windows to output these dump files in case they are needed.
However, note the following points:
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The size of the memory dump depends on the real memory size. The larger the installed physical memory, the larger the memory dump. Allocate sufficient disk space to collect a memory dump. For details, see STOP errors in the Windows help.
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Not only JP1 event information but also error data for other application programs is output in a crash dump. Output of a crash dump reduces the amount of available disk space by the volume of output data. Allocate sufficient disk space if you have set Windows to output a crash dump.
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