Here are some logs from the production retracers reprocessing a failure of this category.

./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:23,549:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Processing.
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:23,617:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Decompressing to /tmp/tmpAUED9R-swift.5063ed58-0c44-11e6-9d57-fa163ebeb28a.oopsid.core
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:24,061:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Retracing 5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,157:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Writing back to Cassandra
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,162:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Apport did not return a crash_signature.
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,162:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:StacktraceTop:
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,163:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:?? ()
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,163:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:?? ()
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,163:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:?? ()
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,163:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:?? ()
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,163:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:?? ()
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:55:35,163:21330:140638664505088:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Requeueing a possible apport failure.
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:07,290:4986:139655565539072:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Processing.
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:07,429:4986:139655565539072:INFO:urllib3.connectionpool:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Starting new HTTP connection (1): 10.34.0.136
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:07,748:4986:139655565539072:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Decompressing to /tmp/tmp3QdAr4-swift.5063ed58-0c44-11e6-9d57-fa163ebeb28a.oopsid.core
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:08,202:4986:139655565539072:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Retracing 5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:28,236:4986:139655565539072:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Writing back to Cassandra
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:28,267:4986:139655565539072:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Successfully retraced.
./e-t-retracer-app-10.42.32.39/production-logs/retracer-amd64.log:2016-04-27 06:57:30,099:4986:139655565539072:INFO:root:5063ed58-0c44-11e6-9d57-fa163ebeb28a:swift:Done processing /tmp/tmp3QdAr4-swift.5063ed58-0c44-11e6-9d57-fa163ebeb28a.oopsid

This was retried many more times than I would have expected though.