List of Big Data Discovery logs

This topic provides a list of all the logs generated by a BDD deployment. It also has a summary of where to find logs for each BDD component, and tells you how to access logs.

This topic includes:

List of BDD logs

Log Purpose Default Location
WebLogic Admin Server domain log Provides a status of the WebLogic domain for the Big Data Discovery deployment. See WebLogic Domain Log. $BDD_DOMAIN/servers/AdminServer/logs/bdd_domain.log
WebLogic Admin Server server log Contains messages from the WebLogic Admin Server subsystems. For both server logs, see WebLogic Server Log. $BDD_DOMAIN/servers/AdminServer/logs/AdminServer.log
WebLogic Managed Server server log Contains messages from the WebLogic Managed Server subsystems and applications. $BDD_DOMAIN/servers/<serverName>/logs/<serverName>.log
Dgraph Gateway application log WebLogic log for the Dgraph Gateway application. See Dgraph Gateway log entry format $BDD_DOMAIN/servers/<serverName>/logs/<serverNamem>-diagnostic.log
Dgraph stdout/stderr log Contains Dgraph startup messages, as well as warning and error messages. See Dgraph stdout/stderr log. $BDD_HOME/logs/dgraph.out
Dgraph request log Contains entries for processed Dgraph requests. See Dgraph request log. $BDD_HOME/dgraph/bin/dgraph.reqlog
Dgraph tracing ebb logs Dgraph Tracing Utility files, which are especially useful for Dgraph crashes. See Downloading Dgraph trace files. $BDD_HOME/dgraph/bin/dgraph-<serverName>-*.ebb
Dgraph HDFS Agent stdout/stderr log Contains startup messages, as well as messages from operations performed by the Dgraph HDFS Agent (such as ingest operations). See the Data Processing Guide. $BDD_HOME/logs/dgraphHDFSAgent.out
Studio application log in Log4j format Studio application log (in Log4j format). For both Studio application logs, see About the main Studio log file. $BDD_DOMAIN/servers/<serverName>/logs/bdd-studio.log
Studio application log in ODL format Studio application log (in ODL format). $BDD_DOMAIN/servers/<serverName>/logs/bdd-studio-odl.log
Studio metrics log in Log4j format Studio metrics log (in Log4j format). For both Studio metrics logs, see About the metrics log file. $BDD_DOMAIN/servers/<serverName>/logs/bdd-studio-metrics.log
Studio metrics log in ODL format Studio metrics log (in ODL format). $BDD_DOMAIN/servers/<serverName>/logs/bdd-studio-metrics-odl.log
Data Processing logs Contains messages resulting from Data Processing workflows. See the Data Processing Guide. /opt/bdd/edp/data/edpLog*.log
CDH logs (YARN logs, Spark worker logs, ZooKeeper logs) YARN and Spark logs from CDH processes that ran Data Processing workflows, as listed in the Data Processing Guide. See the Cloudera documentation for information on the ZooKeeper logs. Available from the Cloudera Web UI for the component.

Where to find logging information for each component

This table lists how to find detailed logging information for each Big Data Discovery component:
Name of component in Big Data Discovery Where to find logging information?
Studio See Studio Logging.
Data Processing Data Processing is a component of BDD that runs on CDH nodes in the BDD deployment. For Data Processing logs, see the Data Processing Guide.
Dgraph Gateway (and WebLogic Server logs) See Dgraph Gateway Logging
Dgraph See Dgraph request log and stdout/sterr log
Dgraph HDFS Agent The Dgraph HDFS Agent is responsible for importing and exporting Dgraph data to HDFS. For HDFS Agent logs, see the Data Processing Guide.

Ways of accessing logs

You can access the logs for some components of Big Data Discovery through bdd_admin.sh dgraph-admin and EM plug-in for BDD:
Method of accessing logs Logging tasks
Logging options available in bdd-admin.sh dgraph-admin
Use the bdd-admin.sh dgraph-admin command for these operations on Dgraph logs:
Logging options available in Enterprise Manager plug-in for Big Data Discovery
Use the Enterprise Manager plug-in to access logs for Studio, Dgraph and the BDD cluster, to configure verbose logging for the Dgraph, and to roll the Dgraph request log.