Dan Wang

## Background Recently a cluster on production environment was found that primary meta server had frequently disconnected the replica servers, for the reason that the duration since the last beacon...

Core dumped for unit test meta_bulk_load_http_test.start_compaction_test

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While executing `meta_bulk_load_http_test.start_compaction_test` core dumped as follows: ``` [----------] 2 tests from meta_http_service_test [ RUN ] meta_http_service_test.get_app_from_primary [ OK ] meta_http_service_test.get_app_from_primary (671 ms) [ RUN ] meta_http_service_test.get_app_envs [ OK ]...

Unit test failed for tools_common.asio_network_provider_connection_threshold

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Unit test `tools_common.asio_network_provider_connection_threshold` sometimes failed for the following error: ``` [----------] 4 tests from tools_common [ RUN ] tools_common.asio_net_provider [ OK ] tools_common.asio_net_provider (9 ms) [ RUN ] tools_common.asio_udp_provider [...

While unit test `load_from_private_log_test.ignore_useless` was being executed, it failed to write mutation log file header then broken down with an unhandled error as follows (https://github.com/apache/incubator-pegasus/runs/7387575656?check_suite_focus=true) : ``` [----------] 9 tests...

# 1. Motivation The root cause of introducing a new metrics system is the unreasonable naming of the perf-counter, as it's been described in [2020-08-27-metric-api.md](https://github.com/apache/incubator-pegasus/blob/master/rfcs/2020-08-27-metric-api.md). The naming is verbose: besides...

This PR is to fix https://github.com/apache/incubator-pegasus/issues/1164. Once third-parties have changed, image will not be used thus hadoop-2.8.4.tar.gz should be downloaded. On the other hand, an error was reported as: ...

hadoop-2.8.4.tar.gz failed to be downloaded very frequently for workflows as follows:    The reason could be that during a short period of time there are several tens of...

Pegasus has been supported to be built with jemalloc in https://github.com/XiaoMi/rdsn/pull/910, https://github.com/apache/incubator-pegasus/pull/1050. However, we still require some tools to administer jemalloc dynamically, including: - dump configurations and statistics to check...

``` 2022-09-13 05:54:54 (3.42 MB/s) - 'apache-zookeeper-3.7.0-bin.tar.gz' saved [12387614/12387614] Decompressing zookeeper... ZooKeeper JMX enabled by default Using config: /__w/incubator-pegasus/incubator-pegasus/.zk_install/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg Starting zookeeper ... STARTED Zookeeper started at port 22181 starting server...

This PR is to fix https://github.com/apache/incubator-pegasus/issues/1157. This issue must be caused by invalid logging format as follows: ```C++ dassert(false, "gpid({}) on node({}) is not exist on meta server, administrator "...