Logs SigNoz Cloud Troubleshooting

These are instructions for logs troubleshooting for SigNoz Cloud.

Q. In java my mdc attributes are not visible in SigNoz

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You can get your mdc attributes by using the appender settings and passing it as -D<property>=<value> format.

For example, for logback you can use otel.instrumentation.logback-appender.experimental.capture-mdc-attributes=* and for log4j you can use otel.instrumentation.log4j-appender.experimental.capture-mdc-attributes=*. Checkout this documentation for more system properties.

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  • If you are collecting application logs from file then make sure that you are emitting the trace_id and span_id to those logs.
  • Once you have trace_id and span_id in your logs, you can parse them using pipelines trace parser - documentation here

Q. I want to extract trace_id and span_id from my log line

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You can extract these using the logs pipelines trace parser - documentation here

Q.I want to extract a attribute from my log line

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The best way to do this is using Logs Pipeline. You can follow these two Docs:

Q. I am sending logs but my logs are not visible on SigNoz

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Check by adding a console exporter on application level if you are using SDK else on a local collector level. Once the above is checked and if you are still facing issue then reach out to us on Intercom - the chatbox at the bottom right corner of your SigNoz Cloud interface.

Q. How to increase the retention period of logs from x days to y days?

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Reach out to us on Intercom - the chatbox at the bottom right corner of your SigNoz Cloud interface.