Splunk® User Behavior Analytics

Release Notes

This documentation does not apply to the most recent version of Splunk® User Behavior Analytics. For documentation on the most recent version, go to the latest release.

Known issues in Splunk UBA

This version of Splunk UBA has the following known issues and workarounds.

If no issues are listed, none have been reported.


Date filed Issue number Description
2024-09-12 UBA-19395 False Positive Suppression Model tagging multiple times the same anomalies "False Positive"

Workaround:
The False Positive Suppression Model introduced in Splunk UBA version 5.4.0 redundantly tags anomalies as false positives, even when they have already been marked as such by the model the previous day. Users can remove these redundant tags by running the following command:
psql -d caspidadb -c "UPDATE anomalies SET tagids = (SELECT ARRAY(SELECT DISTINCT unnest(tagids))) WHERE tagids IS NOT NULL;" 

This command can also be added to a cron job to run automatically every day at 8 AM.

2024-09-09 UBA-19388 The monthly pg cleanup scripts didn't run as expected to perform the periodic cleanup of incremental backups and PostgreSQL files

Workaround:
These two scripts may require modifications to match the environment:
/opt/caspida/etc/cron.monthly/remove_pg_logs
/opt/caspida/etc/cron.monthly/remove_pg_walarchives

Perform periodic cleanup of the backup files per Splunk Documentation.

/opt/caspida/etc/cron.monthly/remove_pg_walarchives

This script has the path of the WAL_ARCHIVE hardcoded to "/backup/wal_archive". It may require modifications to match the name of the third disk for the backup.

psql archiving:           archive_mode              | on

                              wal_level                 | logical

                              wal_compression           | off

                              max_standby_archive_delay | 30s

                              archive_timeout           | 0

                              archive_command           | test ! -f /ubabackup/wal_archive/%f && cp %p /ubabackup/wal_archive/%f

 

    backup.enabled:           backup.filesystem.enabled=true

    backup interval:          backup.filesystem.full.interval=7d

    backup filesystem:        backup.filesystem.directory.restore=/ubabackup
 
/opt/caspida/etc/cron.monthly/remove_pg_logs 

This script may require modifications to remove the postgres logs in /var/log/postgresql/


2024-08-16 UBA-19309 Custom models created by cloning a cloned custom model sometimes do not work
2024-04-30 UBA-18862 Error Encountered When Cloning Splunk Datasource and Selecting Source Types

Workaround:
Re-enter the password on the Connection page for the Splunk endpoint.
2024-04-26 UBA-18851 Benign Error Message on Caspida start - Ncat: Connection Refused
2024-04-25 UBA-18846, UBA-18920 Inconsistent telemetry status when UBA is in FIPS mode
2024-04-03 UBA-18721 UBA identifies end user/service account are accessing hard disk volumes instead of built-in computer account

Workaround:
Disable the augmented_access rule.

Steps to disable rule:

1. remove (or move to some other location outside of UBA as a backup) the file /etc/caspida/conf/rules/user/ad/augmented_access.rule

2. sync-cluster (/opt/caspida/bin/Caspida sync-cluster /etc/caspida/conf/rules/user/ad/)

3. restart uba (/opt/caspida/bin/Caspida stop & /opt/caspida/bin/Caspida start)

2022-12-22 UBA-16722 Error in upgrade log, /bin/bash: which: line 1: syntax error: unexpected end of file
2022-06-22 UBA-15882 Benign Spark error message: Could not find CoarseGrainedScheduler in spark-local.log when upgrading UBA
2022-02-14 UBA-15364 Spark HistoryServer running out of memory for large deployments with error: "java.lang.OutOfMemoryError: GC overhead limit exceeded"

Workaround:
Open the following file to edit on the Spark History Server: /var/vcap/packages/spark/conf/spark-env.sh

You can check deployments.conf field spark.history to find out which node runs the Spark History Server.

Update the following setting to 3G: SPARK_DAEMON_MEMORY=3G

Afterwards, restart the spark services:

/opt/caspida/bin/Caspida stop-spark && /opt/caspida/bin/Caspida start-spark
2021-08-30 UBA-14755 Replication.err logging multiple errors - Cannot delete snapshot s_new from path /user: the snapshot does not exist.
2020-04-07 UBA-13804 Kubernetes certificates expire after one year

Workaround:
Run the following commands on the Splunk UBA master node:
/opt/caspida/bin/Caspida remove-containerization
/opt/caspida/bin/Caspida setup-containerization
/opt/caspida/bin/Caspida stop-all
/opt/caspida/bin/Caspida start-all
2017-04-05 UBA-6341 Audit events show up in the UBA UI with 30 minute delay

Last modified on 19 September, 2024
Welcome to Splunk UBA 5.4.0   Fixed issues in Splunk UBA

This documentation applies to the following versions of Splunk® User Behavior Analytics: 5.4.0


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