* spring_async_plugin

* fix

* fix

* fix

* fix

* format fix

* rename

* fix

* fix version

* Update SWCallable.java

* Update Supported-list.md

* Update Supported-list.md

* AsyncAppender

* improve performance

* fix mdc issue

* fix mdc

* add Async demo

* Update powered-by.md

* Update powered-by.md

Change list order

* Support bootstrap class enhance and fix OOM by empty stack of exception.

* Agent document update

* Remove a word.

* Fix wrong cause exception search.

* Fix the condition

* Revert bootstrap class loader enhance.

* Remove import.

* no message

Change go2sky repo. Tetrate.io donated it to SkyAPM

* Remove login permanently.

* Sync UI change.

* Delete `org.apache.skywalking.apm.webapp.security`

* Delete tests.

* Create install_agent_on_websphere.md

* Update README.md

* Add config to control tracing sql parameters

受leader要求，移除公司名单。

* Update powered-by.md

* Update powered-by.md

Change order and format

添加恒天财富投资管理股份有限公司支持信息

* Update powered-by.md

* Update powered-by.md

Chang order

* Update ES-Server-FAQ.md

[Thread Pool](https://www.elastic.co/guide/en/elasticsearch/reference/6.3/modules-threadpool.html?nsukey=W48pJFXgvLgtyfM%2FXI%2FQ8BhcPYE0WjNFGwKD%2Bv0cjUkocQhh1FCPQwklwVBOec541GcUkX899f%2FQv5ikjA8ckqdcrlVHpjATTKbJarNA1Gr%2BltpTiDJe%2FMuqrZGa0CAkbLfIGrYqMyc0s%2BlkxFr%2BzEo2hmWsgMaPZvK9K6f9Xugz0k0v1Wb2nfeex8ZQn0Y9SFEHwRaYV5uzw8rnH9I%2BGg%3D%3D)

From this document, we can find that the bulk thread pool setting is deleted.

write
For single-document index/delete/update and bulk requests. Thread pool type is fixed with a size of # of available processors, queue_size of 200. The maximum size for this pool is 1 + # of available processors.

* Update ES-Server-FAQ.md

* configration-zookeeper

* restore solrj-plugin

* restore solrj-plugin

* Provide Apollo dynamic configuration center implementation. fixes #2825

* Update backend-alarm.md

* Update backend-alarm.md

* Revert SolrJ plugin.

* Remove an unexpected test case.

* Revert "Remove an unexpected test case."

This reverts commit 359990e18b0c0ae1a6e1005ff985bf237ec05619.

* Clear context.

* Fix a leak.

* Adjust pom plugin position and add docs

* Polishing

* Update as requested

* Create ES-Server-FAQ.md

* Update README.md

* Update ES-Server-FAQ.md

* Provide Nacos dynamic configuration center implementation. fixes #2816

* Add unit tests

* Sync

* Replace pull-mode with watch-mode

* Fix ci

* Unify dependency management

* Add integration tests

* Revert unexpected changes

* Add more test cases

* Revert unexpected changes

* Suppress IDE warning

* Correctify volumes position

* Add license header

* Remove Chinese comments

* Sync

* Sync

* Sync

* Sync

* Revert unexpected changes

* Rebase on refactored code and add missing config to docker

* Fix unit test

* Revert unnecessary changes

* new branch for solrj-plugin

* rollback and add module solrj-plugin

* preparing to pr

* to resolve reviewers' suggestions

* remove unused code

* remove unused code

* remove unused comments

* To avoid NPE

* fix typo

* Change to JRE6

* fix pom.xml merge incorrectly. and java.net.URL instead of Regex

* Using RuntimeContext instead of ThreadLocal

* To reduce unnecessary tags

* add test cases

* fix validation fail

* add solrj-plugin into component-libraries & Supported-list

* to trace all patch to avoid recheck status of span

* remove unnecessary properites

* remove unnecessary tags

* Add the config to document of setup

* Implement the base of config API module.

* Finish configuration module codebases w/o tests, revert some changes.

* Finish mock tests.

* Add new gRPC service for configuration.

* Make gRPC configuration sync provider works.

* Add database slow statement dynamic setting.

* Finish the dynamic configuration service.

* Fix version.

* The new feature of Elasticsearch storage with the time series implementation.

* Time bucket util improve.

* Fixed some Gramma error.

* Update ttl.md

Polish English a little.

* Update ttl.md

Add more explicit description of TTL

* Update ttl.md

* Update StorageModuleElasticsearchConfig.java

Set otherMetricsDataTTL = 0 as default, make user more clear.

* Rename the timeSeriesAble to capableOfTimeSeries

* Fixed a test case failure.

* merge

* merge

* Provide plugin for ShardingSphere (#2699)

* Provide plugin for ShardingSphere (#2699)

* Provide plugin for ShardingSphere (#2699)

* adjust package name (#2699)

* fix mvnw (#2699)

* revert files access permission from 644 to 755

* change the access permission from 644 to 755

* change files access permission from 644 to 755

* revert all no changes files

* Update powered-by.md

* Update powered-by.md

Change order.

增加拉勾的Use case

* Update powered-by.md

Change order

* feat(agent sdk): resteasy plugin

* fix(agent sdk): fix component define

* fix(agent sdk): fix file license

* fix(agent sdk): fix file license

* docs(agent sdk): add supported list

* fix(agent sdk): fix file license

* fix(agent sdk): fix response error tag

* fix(agent sdk): fix

* fix(agent sdk): adapter 3.5+

* fix(agent sdk): remove unreasonable async handling

* Update powered-by.md

* Update powered-by.md

Change list order.

* spring cloud gateways plugin