Which common issue can result in sudden data ingestion loss for a data source that was previously successful?

A previously successful data ingestion process that suddenly stops is most commonly due to an authentication or authorization failure. API keys, tokens, and other credentials used to establish a connection between XSIAM and a data source are often configured with an expiration date for security purposes. When the key expires, the data source rejects XSIAM's connection attempts, leading to an abrupt halt in data ingestion. This aligns perfectly with the scenario of a previously functional integration suddenly failing without any other configuration changes.

A. Data source is using an unsupported data format. This would typically cause the integration to fail from the initial setup, not after a period of successful operation.
B. Data source has reached its maximum storage capacity. This is an issue with the source system's ability to generate or store new logs, not a failure of the XSIAM integration itself, which might still be trying to connect.
C. Data source has reached its end of life for support. End-of-life is a planned event and usually does not cause an immediate, unexpected stop. Integrations may continue to function for a time post-EOL.

1. Palo Alto Networks XSIAM Administrator's Guide: In the section "Monitor and Troubleshoot," the guide details monitoring the health of data collectors. A common reason for a collector to enter a "Failed" state is a configuration error, which includes invalid or expired credentials. The guide states, "To investigate the issue, you can view the logs for the App/Addon... Common issues include incorrect credentials...". This directly supports that credential issues are a primary troubleshooting step for failed ingestion. (Reference: XSIAM Administrator's Guide, Chapter: "Monitor and Troubleshoot", Section: "Monitor App/Addon Health").

2. Palo Alto Networks XSIAM Broker VM Administrator's Guide: When troubleshooting data collector issues on the Broker VM, the first steps often involve verifying connectivity and authentication. The command dataset status is used to check for errors, and authentication failures are a frequent cause of a non-operational status for API-based collectors. (Reference: XSIAM Broker VM Administrator's Guide, Section: "Troubleshoot the Broker VM", Subsection: "Troubleshoot Data Collectors").