# devopsgym / testgen__jaegertracing__jaeger-7350 - taskset: [devopsgym](https://harnessreport.com/tasks/devopsgym.md) - difficulty: hard - category: test-generation - language: - runnable from the site: no - agent timeout: 3000s ## Results by harness _none yet_ ## Instruction ``` The following text contains a user issue (in <issue/> brackets) posted at a repository. Further, you are provided with file contents of several files in the repository that contain relevant code (in <code> brackets). It may be necessary to use code from third party dependencies or files not contained in the attached documents however. Your task is to identify the issue and implement a test case that verifies a proposed solution to this issue. More details at the end of this text. <issue> ### What happened? A span from HotROD stored in Elasticsearch fails to load properly. The UI shows: ``` blockers | invalid string type in [2804-5] ``` ### Steps to reproduce I added logging of a collection-typed attribute to HotROD ```diff diff --git a/examples/hotrod/pkg/tracing/mutex.go b/examples/hotrod/pkg/tracing/mutex.go index f094d057..7264e995 100644 --- a/examples/hotrod/pkg/tracing/mutex.go +++ b/examples/hotrod/pkg/tracing/mutex.go @@ -42,6 +42,7 @@ func (sm *Mutex) Lock(ctx context.Context) { fmt.Sprintf("Waiting for lock behind %d transactions", waiting), zap.String("blockers", fmt.Sprintf("%v", sm.waiters)), ) + activeSpan.SetAttributes(attribute.StringSlice("blockers", sm.waiters)) } sm.waiters = append(sm.waiters, session) sm.waitersLock.Unlock() ``` Run Jaeger with Elasticsearch and HotROD ``` $ cd docker-compose/elasticsearch/v8 $ docker compose up $ go run ./cmd/jaeger --config ./cmd/jaeger/config-elasticsearch.yaml $ go run ./examples/hotrod all ``` Open HotROD at http://0.0.0.0:8080/ and quickly click one button several times so that latency goes up (blocking in the code). Open the trace and expand tags of the `mysql` span. ### Expected behavior I expect no errors in the display. The collection-typed tag `blockers` should be converted into a JSON string. ### Relevant log output The trace can be loaded from Elasticsearch directly (fix index name and trace id): ```shell $ curl -X GET "localhost:9200/jaeger-main-jaeger-span-2025-07-19/_search?pretty" -H 'Content-Type: application/json' -d' { "size": 100, "query": { "match": { "traceID": "b9f674a5dd0395ac04c4f209d93cef07" } } } ' > trage.json ``` It appears to be stored as proper JSON array, but with incorrect type `string`, which later fails to load. ``` { "key" : "blockers", "type" : "string", "value" : [ "2804-5" ] } ``` </issue> Please generate test cases that check whether an implemented solution resolves the issue of the user (at the top, within <issue/> brackets). You may apply changes to several files. Apply as much reasoning as you please and see necessary. Make sure to implement only test cases and don't try to fix the issue itself. You are not allowed to read git history. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp