Fixed feign-micrometer exception handling. #2644
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I've just added some fixes, as there were exceptions when some clients had defined a custom ErrorDecoder. The input stream is consumed, and the decoder throws an exception. This way, we are copying the input stream so it can be used multiple times. |
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Some suggestions could not be made:
- annotation-error-decoder/pom.xml
- lines 49-48
- apt-test-generator/pom.xml
- lines 62-61
- benchmark/pom.xml
- lines 70-69
- core/pom.xml
- lines 37-36
- googlehttpclient/pom.xml
- lines 54-53
- hc5/pom.xml
- lines 67-66
- httpclient/pom.xml
- lines 75-74
- hystrix/pom.xml
- lines 78-77
- jackson-jaxb/pom.xml
- lines 82-83
- java11/pom.xml
- lines 50-49
- jaxb-jakarta/pom.xml
- lines 34-35
- lines 55-57
- jaxb/pom.xml
- lines 45-49
- jaxrs2/pom.xml
- lines 103-102
- jaxrs3/pom.xml
- lines 89-88
- jaxrs4/pom.xml
- lines 83-82
- kotlin/pom.xml
- lines 71-70
- okhttp/pom.xml
- lines 59-58
- pom.xml
- lines 579-580
- reactive/pom.xml
- lines 98-97
- ribbon/pom.xml
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- soap-jakarta/pom.xml
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- soap/pom.xml
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| if (response.body() != null) { | ||
| response = | ||
| response.toBuilder().body(Util.toByteArray(response.body().asInputStream())).build(); | ||
| } |
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If your intent is to properly flag the request with the appropriate error based on status, reading the response into memory before checking the status code may be problematic in certain scenarios. Particularly in one where a large number of successful responses are monitored with large data sets.
By doing this, we impress upon our users that their applications must be able to stream all data from all tracked operations into memory in order to observe this.
Can you help me understand the exceptions observed when trying to observe a client with a custom ErrorDecoder?
If this must be part of the solution, we should document this assumption and control this behavior with a configurable feature flag, initially off, and allow our users to make the decision whether to take this on.
Head branch was pushed to by a user without write access
The current MR improves exception handling for feign-micrometer clients. Previously, exceptions such as 404, 400, 500, etc., were not marked with error=true in the Observation and thus were not reported in the trace as errors.
The exception declaration has been changed from (FeignException ex) to (Exception ex), as none of the supported clients (e.g., Apache HttpClient, OkHttp) throws FeignException, but rather client-specific exceptions.
The fix is currently in production in my organization, and it has been working effectively.
Fixes #2566