esevastyanov commented on a change in pull request #8157: Enum of
ResponseContext keys
URL: https://github.com/apache/incubator-druid/pull/8157#discussion_r307905543
##########
File path: server/src/main/java/org/apache/druid/server/QueryResource.java
##########
@@ -252,24 +252,30 @@ public void write(OutputStream outputStream) throws
WebApplicationException
)
.header("X-Druid-Query-Id", queryId);
- if (responseContext.get(ResponseContext.CTX_ETAG) != null) {
- builder.header(HEADER_ETAG,
responseContext.get(ResponseContext.CTX_ETAG));
- responseContext.remove(ResponseContext.CTX_ETAG);
+ if (responseContext.get(ResponseContext.Key.ETAG) != null) {
+ builder.header(HEADER_ETAG,
responseContext.get(ResponseContext.Key.ETAG));
+ responseContext.remove(ResponseContext.Key.ETAG);
}
DirectDruidClient.removeMagicResponseContextFields(responseContext);
//Limit the response-context header, see
https://github.com/apache/incubator-druid/issues/2331
//Note that Response.ResponseBuilder.header(String key,Object
value).build() calls value.toString()
//and encodes the string using ASCII, so 1 char is = 1 byte
- String responseCtxString = responseContext.serializeWith(jsonMapper);
- if (responseCtxString.length() > RESPONSE_CTX_HEADER_LEN_LIMIT) {
- log.warn("Response Context truncated for id [%s] . Full context is
[%s].", queryId, responseCtxString);
- responseCtxString = responseCtxString.substring(0,
RESPONSE_CTX_HEADER_LEN_LIMIT);
+ final ResponseContext.SerializationResult serializationResult =
responseContext.serializeWith(
+ jsonMapper,
+ RESPONSE_CTX_HEADER_LEN_LIMIT
+ );
+ if (serializationResult.isReduced()) {
+ log.warn(
Review comment:
I'm not sure about that, even left the log message as is although the
context is not truncated anymore but "reduced". According to the [corresponding
PR discussion](https://github.com/apache/incubator-druid/pull/2336), it was
important to have a log message with full context, it's likely someone has a
filter in a log aggregator for this kind of message.
BTW I see your point and started discussion to only mention backward
compatibility for log filters.
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