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This article introduces the relevant knowledge of "how to subscribe to email by Apache IoTDB". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Subscribe to mailing list

The main communication method of Apache project is mailing list. The mailing list of our project developers is dev@iotdb.apache.org. As long as you subscribe to this mailing list, you can receive emails sent by other people to this mailbox. Similarly, the emails you send here will also be received by others, similar to a WeChat group with a slightly higher delay.

The subscription method is to use the mailbox to send an email to dev-subscribe@iotdb.apache.org, the subject content is random, you can write subscribe. You will then receive a confirmation email with a link in the confirmation email, and then reply to this confirmation link and the subscription will be successful.

The first thing after subscription is to send a self-introduction, you can introduce your name, region, company, familiar language, technology stack, and so on.

You don't have to take the mailing list so seriously, in fact, you can discuss anything related to the project, including hosting meetup, feedback bug, sharing design ideas, or just getting started and asking others to introduce some entry-level task items.

The new attitude towards the mailing list is: not afraid to make mistakes, not afraid to make mistakes, speak enthusiastically.

Looking for a suitable issue

Jira is usually used.

In addition, the issue of github is also available.

If you don't know which features are suitable for you, you can ask them in the mailing list, or you can ask me.

Compile source code git clone https://github.com/apache/incubator-iotdb.git

Next, you need to mark the thrift/target/generated-sources/thrift and antlr/target/generated-sources/antlr4 directories as project source code for IDE to recognize.

Take the IDEA tag antlr directory as an example:

At this point, there should be nothing red in the code.

Debug server code

The first time you debug IoTDB, you can start with two modules, the server (server) and the command line tool (cli).

First start the server, and the main class IoTDB,debug mode starts.

Next, make a breakpoint to the executeStatement of the TSServiceImpl class, and the statements written in the Cli will be sent to the server, and the server thread will process the statements through this rpc function.

Next, start the command line tool. The main class is Cli (mac, linux) or WinCli (windows). Missing parameters will be reported after startup. You can select Cli at the arrow, and then Edit Configuration

Set several parameters in the class javadoc to Program arguments and click Apply,OK.

Then run can start Cli (if you want to debug the client, you can start in debug mode). After startup, you can enter a command in the console of run. Here, take the creation of a storage group as an example. After entering enter, the client process begins to wait for the server to return the result.

At this time, it will automatically jump to the debugger of the server process, and you can officially debug it.

Another suitable way to learn code is to run test cases, each module has a corresponding test case, the common UT name corresponds to (the class name of the test + Test), and the suffix of the integration test is IT.

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