Last modified: 2014-10-31 18:16:14 UTC
Traces sometimes have more than 80k entries, so that's also a problem for the logging infrastructure.
Update: This only seems to happen sometimes (in job runners mostly AFAIS), also I checked the data per hand and the serialization looks fine.
Looks like Katie's https://github.com/wmde/WikibaseDataModel/commit/05bd532e3ce6f5b9e31259b70acbca27f778e40c fixed this as well \o/