* Add FAQ about VNode on the UI.
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

* Polish the context and optimize the tag analyze

* Fix bug of new context codes.

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* 1.Add ThreadPoolExecutor for handle kafka message.
Co-authored-by: NDaming <zteny@foxmail.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* add http client parameter collector
* Update CHANGES.md
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

The current implementation of envoy ALS K8S analysis is based on the hierarchy, pod -> StatefulSet -> deployment, StatefulSet, or others. It's freaky and different from the Istio Kubernetes registry.

The new path is pod -> endpoint -> service, and we should leverage Informer API instead of raw Kubernetes API.

Add syncBulkActions config to avoid the large amount of metrics data written ES in a single sync bulk request. (#5699)

* Fix shardingSphere plugin test fail if have some same ENHANCE_CLASS define.

* support 4.1.0 and 4.1.1

* support 4.1.0 and 4.1.1

* 8.0.0 changes

* Add a missing dot.

* Remove the local span and exit span register mechanism in Java agent scenario.

* Fix config, plugin, and document, as exit span is not required register anymore.

* Try to fix the test case expected data due to no register for exit span.

* Fix toolkit case.

* Remove exit span from plugin test framework document.

* Update protocol, FAQ, and CHANGELOG documents to highlight this change.

* Fix NPE when no entry span in the whole segment. Set endpoint to null in segment entity.

* Fix the snapshot and add inexistence operation name id.

* Fix several async cases.

* Fix undertow test case.

* Fix wrong error log name.

* Keep name consistent with 6.x concepts.

* Try to fix 3 async scenarios.

* Fix okhttp case.

* Fix Spring Async case.

* Fix another NPE

* Fix NPE when first span has no endpoint id when it is local or exit span.

* Still fill first operation name when no endpoint id.

The pull request #3323 was missed in the list of changes.

* Add change log for 6.5.0

* Add changelog for 6.4.0 release.

* Update CHANGES.md

ES storage column type changed for pxx details. It wouldn't really 100% compatible.

* GC time metrics should be total time.

* Add it to change log.

* FYI @hanamily you missed to change this in self observability.

* fix changes.md typo

* fix typo

* Add changelog for 6.3.0 release.

* Update CHANGES.md
Co-Authored-By: Nkezhenxu94 <kezhenxu94@apache.org>

* Update CHANGES.md

* Rename metric to metrics.

* Fixed test case execute failure issues.

spelling

* Fix bug about match query.

* Update UI and alarm query

* Fix style

* Fix NPE.

Update all "incubator-skywalking" to "skywalking" ,"incubator-servicecomb-java-chassis" to "servicecomb-java-chassis" correctly, and ".gitmodules" will update at #2531 (#2548)

* fix no language attr value in mesh (#2182)

* Fixed the inventory register lock invalid bug. (#2184)

* #2183

Merge commit into master.

* Make the h2 register lock same as mysql.

* Fix #2186

* Provide consul cluster plugin.

* Change log and application config file.

* Add consul's config item into the docker's application.yml.

* Fixed bug.

* Add consul description into  readme.

* Add okhttp component license.