Peter Kingswell

adds x-client-id header to example curl in docco

1

addresses [add x-client-id to markdown documentation examples for /query/...](https://github.com/spotify/heroic/issues/754)

Fix "...Span <span name> is GC'ed without being ended." issue (caused by a BT timeout)

1

#### 100's of Tracing Spans are left un-ended from every query timeout - I am a prism goalie - Who wants to have a stable heroic - So that I...

basically need to find a neat way of adding "x-client-id: my-app" to the example cURLs given in https://spotify.github.io/heroic/docs/api/post-query-metrics and https://spotify.github.io/heroic/docs/api/post-query-batch . it's not that easy since we want this only...

Investigate & resolve nondeterministic build errors

1

- I am a heroic developer - Who wants to have deterministic builds - So that I can retain my sanity and be productive instead of chasing random build errors...

So the [serializeAndLog](https://github.com/spotify/heroic/blob/f2781c7579a0b107ffa404aae7f1971f43d65067/heroic-core/src/main/java/com/spotify/heroic/querylogging/Slf4jQueryLogger.java#L138) method is called by all "log this sentence to disk" methods in the Slf4jQueryLogger class. This is ***incredibly*** wasteful as for every single line of the log...

Analyse Heroic and user's perspective when hitting a timeout. Then implement necessary changes.

2

### Implement Findings #### Use Case Resolved: unknown Bigtable timeout & retry behaviour - I am a Heroic developer - who wants to make sure that our timeout & retry...

Find/Create BigTable Load Simulator

1

From [#bigtable](https://spotify.slack.com/archives/C0JQP0P38/p1603540428089200): > Hi BigTable folks, > I want to analyze how Heroic behaves when BigTable is under severe load. As I understand it, Heroic experiences this as very long...

upgrade bigtable-client-core library from 1.12.1 to 1.18.1 (latest) to eliminate retries bug

1

#### our version of bigtable-client-core has serious bugs - I am a heroic dev - Who wants to have a stable system - So that I can focus on features,...

Bigtable server-side and client-side & Heroic-side behaviour analysis

1

#### Bigtable server-side and client-side & Heroic-side behaviour analysis - I am a heroic dev, implementing shorter timeouts - Who wants to know how heroic will react to these exceptions...

#### our Bigtable library is no longer receiving new features - I am a heroic developer - Who wants to leverage the latest fixes and features of bigtable - So...