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As needed, you can modify via parameter the logging levels for the following services of the platform. These settings should only be modified when you are debugging an issue. After the issue is resolved, you should set the logging level back to its original value.

You can apply this change through the Admin Settings Page (recommended) or trifacta-conf.json. For more information, see Platform Configuration Methods.

For more information on these services, see System Services and Logs.

For more information on logging levels, see https://logging.apache.org/log4j/log4j-2.12.0/manual/customloglevels.html .

Access

Trifacta® administrators can access the logs through the Trifacta application. Use the following URL:

<hostname>:<port_number>/logs

For more information on the available logs, see System Services and Logs.

Configure

Mask PII

You can use the following settings to mask personal information in the log files. However, doing so may complicate debugging:

Logging Parameter and Default ValueDescription
"logging.piiMask.enabled": false,

Set this value to true to enable masking of personally identifiable information (PII) in log files. In the Trifacta platform, this feature masks email addresses (userIds) with hashed values.

"logging.piiMask.salt": "this is a grain of salt",
When PII masking is enabled, this value can be used as a randomizing element for generating hashed values.

Configure log rotation

By default, log files for each service is automatically rotated for you.

As needed, you can enable and configure log rotation for additional log files. When enabled, the following logs are subject to rotation:

  • proxy_access.log

  • proxy_error.log

  • batch-job-runner.access.log

  • data-service.access.log

  • ml_service.access.log

  • scheduling-service.access.log

  • time-based-trigger-service.access.log

NOTE: By default, these log files are rotated by supervisord. For more information on default values for stdout_logfile_maxbytes, stdout_logfile_backups, and stderr equivalents, see http://supervisord.org/configuration.html#program-x-section-values.

The following logs are excluded from log rotation and are not rotated when this feature is enabled:

  • join-inf.log
  • join-sel.log
  • protobuf-events.log
  • webapp.analytics.log
  • segment-proto.log

To enable log rotation, you must copy the default configuration file into the appropriate working directory and set permissions:

sudo cp /opt/trifacta/conf/trifacta-logrotate.conf /etc/logrotate.d/trifacta-logrotate.conf
sudo chown root: /etc/logrotate.d/trifacta-logrotate.conf
sudo chmod 644 /etc/logrotate.d/trifacta-logrotate.conf

You can test the configuration using the following command:

sudo logrotate --debug /etc/logrotate.d/trifacta-logrotate.conf

Configure log format for access logs

The following are the access logs:

ServiceApplicable Log FilesParameter
VFS Servicevfs-service.access.logvfs-service.loggerOptions.format
WebAppwebapp.access.logwebapp.loggerOptions.format

You can configure the fields and format of them.

NOTE: This field configuration applies only the log files listed above.

For each of the above parameters, you can use a token-based method of configuring the fields to include in a log entry in the listed logs. You can modify:

  • The sequence of fields
  • The fields to include
  • For some fields, you can specify specific subsets of the available information.

Entries are specified as space-delimited fields, each of which begins with a colon:

:field1 :field2 :field3

For more information on these log format options, see https://github.com/expressjs/morgan#tokens.

Log format for application logs

Application log files have the following structure:

2019-07-09T11:46:54.667Z - warn: [EXPRESS] received extra query parameter(s): limit,offset,numPageLinks [url=/v4/connections/2/query] [method=GET] [sid=9133aa58-9cbb-4e0a-bfb4-2c59c44ffe2d] [rid=e4319f35-82a1-4c0b-a2d3-2e75d224178a]

The following fields are included in these files:

NOTE: These fields cannot be modified.


FieldDescription
Timestamp

Date and timestamp in UTC when the event occurred

NOTE: Log values are timestamped in UTC time zone.

LevelLogging level for the event: info, warning, error, or debug
sidThe user's session identifier. Session Ids may be preserved across logins, but they may occasionally change if the user logs out of the application.
ridThe request identifier is unique to the specific request and is preserved across all services.
methodHTTP method that was used to invoke the request
url

URL of the endpoint that triggered the event. Hostname and port number are not included.

NOTE: Query parameters are not included in the URL.

Configure output format

By default, logs are in flat text format and exported as .log files. 

Some loggers enable output in JSON format.

NOTE: JSON format is not recommended for Trifacta Wrangler Enterprise. You may not be able to download logs in JSON format.


NOTE: Log files that are configured for JSON output format cannot be included in the support bundle. See Support Bundle Contents.

To enable JSON format, locate the appropriate parameter, where the wildcard below represents the service. Set the value to true:

"*.loggerOptions.json": true,

Save your changes and restart the platform or service.

More examples are listed below.

Service Log Configuration

WebApp

The WebApp manages loading of data from the supported connections into the front-end web interface.

NOTE: After changing these settings, the platform must be restarted.

Logging Parameter and Default ValueDescription
"webapp.loggerOptions.silent": false,
When set to true, log messages are silent.
"webapp.loggerOptions.level": "info",
Supported levels (in decreasing order of verbosity): silly, debug, info, warning, error
"webapp.loggerOptions.json": false,

 

 

If set to true, logging output is in JSON format.

NOTE: JSON format is not recommended for Trifacta Wrangler Enterprise. You may not be able to download logs in JSON format.

"webapp.loggerOptions.format": ":method :url :status :res[content-length] :response-time :referrer :remote-addr :trifacta-user :user-agent",
String containing list of fields to include in each log message.

Batch Job Runner

The Batch Job Runner service manages the execution of batch jobs on the backend running environment.

Logging Parameter and Default ValueDescription
"batch-job-runner.systemProperties.batch.rootLogLevel": "info",

Supported levels (in decreasing order of verbosity): trace, debug , info , warn , error, fatal, off 


Java VFS Service

Loads data from various filesystems supported by the platform. For more information, see Configure Java VFS Service.

Logging Parameter and Default ValueDescription
"java-vfs-service.systemProperties.logging.type": "regular",

Set the type of output log:

  • regular - regular files written to the Trifacta node
  • json - JSON files should be used with cloud deployments only.
"java-vfs-service.systemProperties.logging.level": "info",
Supported levels (in decreasing order of verbosity): trace , debug , info , warning , error, fatal, off
"java-vfs-service.systemProperties.logging.fileName": "logs/java-vfs-service.log"

Filename to which log files are written to the Trifacta node

"java-vfs-service.systemProperties.access.log.path": "%(topOfTree)s/logs"

Path to the access log file for this service.


"java-vfs-service.systemProperties.log4j.configurationFile": "log4j2.xml"

Path to the Log4J2 configuration file on the Trifacta node.

NOTE: Do not modify this path or file unless necessary.


VFS Service

Loads data from the various filesystems supported by the platform, both in the front-end user interface and in batch mode when the Trifacta Photon running environment or Trifacta Photon web client is enabled. Both are enabled by default. For more information, see Configure VFS Service.

Logging Parameter and Default ValueDescription
"vfs-service.loggerOptions.silent": false,
When set to true , log messages are silent.
"vfs-service.loggerOptions.level": "info",
Supported levels (in decreasing order of verbosity): silly , debug , info , warning , error
"vfs-service.loggerOptions.json" : false,

If set to true , logging output is in JSON format.

NOTE: JSON format is not recommended for Trifacta Wrangler Enterprise. You may not be able to download logs in JSON format.



"vfs-service.loggerOptions.format": ":method :url :status :res[content-length] :response-time :referrer :remote-addr :trifacta-user :user-agent",
String containing list of fields to include in each log message.

Data Service

Service prepares queries against JDBC interfaces, using internal REST API calls.

Logging Parameter and Default ValueDescription
"data-service.systemProperties.logging.level": "info",
Supported levels (in decreasing order of verbosity): trace, debug , info , warn , error , fatal , off

ML Service

For the ML service, logging level can be modified at the command line:

python cyclone.py —log-level <level>

Supported levels: DEBUGINFO, WARNING ERRORCRITICAL 

Logging Parameter and Default ValueDescription
"ml-service.loggerOptions.json": false,

If set to true , logging output is in JSON format.  

NOTE: JSON format is not recommended for Trifacta Wrangler Enterprise. You may not be able to download logs in JSON format.

JSData

The JSData logging options do not apply to a specific service. Instead, they are used by various services to log activities related to Wrangle  and its interactions with various connections and running environments. 

Logging Parameter and Default ValueDescription
"jsdata.loggerOptions.silent": false,
When set to true , log messages are silent.
"jsdata.loggerOptions.level": "info",
Supported levels (in decreasing order of verbosity): silly , debug , info , error , warn
"jsdata.loggerOptions.json": false,

If set to true , logging output is in JSON format.

NOTE: JSON format is not recommended for Trifacta Wrangler Enterprise. You may not be able to download logs in JSON format.



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