#Incomplete Tracing Data

#Problem Description

The tracing query results exhibit the following issues of incomplete data:

• Recent queries (within the last 30 minutes) are missing some spans.
• Tracing older than 1 hour are experiencing disconnections.

#Root Cause Analysis

#1. Data Persistence Delay

The writing process in Elasticsearch requires a sequence of steps involving memory buffer → translog → segment files, which can result in visibility delays for the most recently written data.

#2. Time Range Limitation

By default, when jaeger-query queries spans corresponding to tracing, the time range extends one hour before and after the start time of the span.

For instance, if a span starts at 08:12:30 and ends at 08:12:32, the time range for querying that tracing would be from 07:12:30 to 09:12:32.

Therefore, if the tracing spans over 1 hour, querying through this span may not yield a complete tracing.

#Solution for Root Cause 1

Wait a moment and refresh the page to try the query again.

#Solution for Root Cause 2

If the tracing span in your environment is lengthy, you can adjust the query time range for a single tracing using the --es.asm.span-trace-query-time-adjustment-hours startup parameter in jaeger-query.

The default value of this parameter is 1 hour, and you can increase this value as needed.