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Loader Log Overview

Updated on 2022-02-22 GMT+08:00

Log Description

Log path: The default storage path of Loader log files is /var/log/Bigdata/loader/Log category.

  • runlog: /var/log/Bigdata/loader/runlog (run logs)
  • scriptlog: /var/log/Bigdata/loader/scriptlog/ (script execution logs)
  • catalina: /var/log/Bigdata/loader/catalina (Tomcat startup and stop logs)
  • audit: /var/log/Bigdata/loader/audit (audit logs)

Log archive rule:

The automatic compression and archiving function are enabled for Loader run logs and audit logs. By default, when the size of a log file exceeds 10 MB, the log file is automatically compressed into a log file named in the following rule: <Original log file name>-<yyyy-mm-dd_hh-mm-ss>.[ID].log.zip. A maximum of 20 latest compressed files are reserved. The number of compressed files can be configured on the Manager portal.

Table 1 Loader log list

Log Type

Log File Name

Description

Run log

loader.log

Loader system log file that records most of the logs generated when the TelcoFS system is running.

loader-omm-***-pid***-gc.log.*.current

Loader process GC log file

sqoopInstanceCheck.log

Loader instance health check log file

Audit log

default.audit

Loader operation audit log file that records operations such as adding, deleting, modifying, and querying jobs and user login

Tomcat log

catalina.out

Tomcat run log file.

catalina. <yyyy-mm-dd >.log

Tomcat run log file

host-manager. <yyyy-mm-dd >.log

Tomcat run log file

localhost_access_log. <yyyy-mm-dd >.txt

Tomcat run log file

manager <yyyy-mm-dd >.log

Tomcat run log file

localhost. <yyyy-mm-dd >.log

Tomcat run log file

Script log

postInstall.log

Loader installation script log file

Log file generated during the execution of the Loader installation script (postInstall.sh)

preStart.log

Pre-startup script log file of the Loader service During startup of the Loader service, a series of preparation operations are first performed (by executing preStart.sh), such as generating the keytab file. This log file records information about these operations

loader_ctl.log

Log file generated when Loader executes the service start and stop script (sqoop.sh)

Log Level

Table 2 describes the log levels provided by Loader. The priorities of log levels are ERROR, WARN, INFO, and DEBUG in descending order. Logs whose levels are higher than or equal to the specified level are printed. The number of printed logs decreases as the specified log level increases.

Table 2 Log levels

Level

Description

ERROR

Error information about the current event processing.

WARN

Exception information about the current event processing.

INFO

Normal running status information about the system and events.

DEBUG

System information and system debugging information.

To modify log levels, perform the following operations:

  1. Go to the All Configurations page of Loader by referring to Modifying Cluster Service Configuration Parameters.
  2. On the menu bar on the left, select the log menu of the target role.
  3. Select a desired log level.
  4. Save the configuration. In the displayed dialog box, click OK to make the configurations take effect.

    NOTE:

    The configurations take effect immediately without the need to restart the service.

Log Formats

The following table lists the Loader log formats.

Table 3 Log formats

Log Type

Format

Example

Run log

<yyyy-MM-dd HH:mm:ss,SSS>|<Log Level>|<Thread that generates the log>|<Message in the log>|<Location of the log event>

2015-06-29 14:54:35,553 | INFO | [localhost-startStop-1] | ConnectionRequestHandler initialized | org.apache.sqoop.handler.ConnectionRequestHandler.<init>(ConnectionRequestHandler.java:100)

Audit log

<yyyy-MM-dd HH:mm:ss,SSS>|<Log Level>|default|<Message in the log>|<Location of the log event>

2015-06-29 15:35:40,969 INFO default: UserName=admin, UserIP=10.52.0.111, Time=2015-06-29 15:35:40,969, Operation=submit, Resource=submission@21, Result=Failure, Detail={[reason:GET_SFTP_SESSION_FAILED:Failed to get sftp session - 10.162.0.35 (caused by: Auth cancel) ];[config:null]}

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