* 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.

* Changelog of beta.

* Add a miss changelog

* Add more documents for v6.

* Make default setting consistent .

* Replace v5 changes by a link to 5.x branch. New v6 changelog.

* Finish query doc and fix a missing field in alarm doc.

* Add link to official oal in alarm doc.

* Fix words.

* Fix some doc

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Change oal doc.

* Remove typo

* Remove document WIP tag.

* Fix few words.

* no message

* Adjust contribution guides.

* Update CHANGES.md

Error rate alarm is not triggered

* Prepare beta2 changelogs.

Fix a format issue.

* Update CHANGES.md

* Update docs for alpha release

* Delete a comma.

* Update How-to-build.md

* Add data-set licenses file

* Rename LICENSES-data-set to LICENSE-data-set

* Update LICENSE

* Remove fastclick from LICENSE

* Make the git submodule command to be a maven profile plugin. Let this command not execute by default install command.

* [maven-release-plugin] prepare release apm-5.0.0-alpha

* [maven-release-plugin] prepare for next development iteration

* Product name is not correct

* Add more documents for release.

* Change profile id.

* Add CHANGES file in distribution file.

* Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit ac815019.

* Revert "[maven-release-plugin] prepare release apm-5.0.0-alpha"

This reverts commit 095597c9.

* Add rat plugin to check dependency license and add license head into missing files.

* Fix docs.

* Exclude web ui config file.

* Next release guide.

* UI update.

* Update docs.

* Build source shell.

* Update CHANGELOG.md

* Update Deploy-backend-in-standalone-mode.md

* Provde the changelog for this month's release.

* Add a new changelog.

* Update CHANGELOG.md