Ellis Breen added a comment - 18/May/18 10:44 AM I've added code to 'snapshot' span info including ID into a result object, and to trigger this whenever an error is raised in a callback, via the 'maybe_push_operr' function, here: https://github.com/couchbase/couchbase-python-client/blob/c6e25f42ecb5d280988e103389275e6ab2487e6e/src/callbacks.c#L76 This sets the mres->errop value which is read when decoding an exception, here: https://github.com/couchbase/couchbase-python-client/blob/c6e25f42ecb5d280988e103389275e6ab2487e6e/src/multiresult.c#L309 I've also set it to always snapshot span info to a result within get_common_objects, for good measure. The info is provided as a 'tracing_output' attribute on the Result object, which is a list of spans. In the 'tags' field of each of these are listed an id and a child_of id. These should correlate with the span IDs provided by the Threshold Logging Tracer.