* add null conditional operators on these 3 files . To aviod some agent exception of Oracle jdbc.

* Add a line in Java Agent section of CHANGES.md file
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* add ;DB_CLOSE_DELAY=-1 to the database URL

* Update CHANGES log

* add ;DB_CLOSE_DELAY=-1 to the H2 database URL of application.yml
Co-authored-by: Nzhanglei36 <zhanglei36@asiainfo.com>

* Fix potential gRPC connection leak(not closed) for the channels among OAP instances.

* Filter OAP instances(unassigned in booting stage) of the empty IP in KubernetesCoordinator.

* sync ui

* docs: update CHANGES.md for ui

* Filter expression based on input samples
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Fix MAL concurrent issues
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

fix influxdb bug while setting influxdb connection response format as InfluxDB.ResponseFormat.JSON (#5946)

* Increase metrics time range
* Remove unused codes
* Update SO11yE2E.java
Co-authored-by: NHongtao Gao <hanahmily@gmail.com>

* Fix jdk-http and okhttp-3.x did not overwrite the old trace header.

* Update CHANGES.md.

* Update manual-sdk.md

* Update README.md

* Update README.md

Remove redundant fields.

* [maven-release-plugin] prepare release v8.3.0

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

* Fix okhttp-3.x and async-http-client-2.x did not overwrite the old trace header.

* fix index not found on trace query when using es7

* add changelog
Co-authored-by: NEvan <evanljp@outlook.com>

* Include SAN to set mTLS property
* Fix codes as SAN is a list.
* Update the changelog.
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>
Co-authored-by: Wu Sheng <wu.sheng@foxmail.com>