9. Tools and Troubleshooting : Troubleshooting and Log Files
 
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Troubleshooting and Log Files
This section lists some common issues that arise when setting up a VectorH installation. See also Configuration Checklist.
Depending on the nature of the issue, information on the problem is recorded in the VectorH log files. Additional information may also be recorded in the Hadoop and Linux log files. Unless overridden during installation or database creation, the location of the VectorH log files is the files subdirectory under the main installation directory ($II_SYSTEM/ingres/files). Of particular interest are:
errlog.log
The installation wide general error and information log file
vectorwise.log
Log file for the execution engine (x100) process
x100errlog.log
Additional information related to execution engine communication
Note:  This file was previously called mpierrlog.log.
Additional log files in this directory contain information about checkpoints (ckpdb.log), configuration changes (config.log), the archiver (iiacp.log) and recovery (iircp.log) processes, and a copy of the installation process output (install.log).
If using YARN the following are also of interest:
vector-agent.log
Log file for the DbAgent utility, which starts the Application Master
vector-wset-appmaster.log
Log file for the Application Master, which manages the resource requirements for x100_server