Hi,

Ok, I found this in the current iotdb-env.sh:

```
@REM Ensure that any user defined CLASSPATH variables are not used on startup
set CLASSPATH=""
```

Best,
--
Jialin Qiao
School of Software, Tsinghua University

乔嘉林
清华大学 软件学院

> -----原始邮件-----
> 发件人: "Tian Jiang" <[email protected]>
> 发送时间: 2019-09-05 09:05:29 (星期四)
> 收件人: "[email protected]" <[email protected]>
> 抄送: "[email protected]" <[email protected]>
> 主题: Re:  Resolve "input line is too long" in windows os
> 
> Hi,
> 
> 
> I think it is fine, since we are not sure what %CLASSPATH% would be 
> originally, if we depend on some unknown external dependencies, things may 
> get uncontrollable.
> 
> 
> Tian Jiang
> 
> 
> | |
> Tian Jiang
> |
> |
> [email protected]
> |
> 签名由网易邮箱大师定制
> On 9/5/2019 08:55,Jialin Qiao<[email protected]> wrote:
> Hi Zesong,
> 
> Thanks for sharing your experience :)
> 
> I just have a question about this line:
> 
> set CLASSPATH=%IOTDB_CLI_HOME%\lib\*
> 
> Should it be the following command?
> 
> set CLASSPATH=%CLASSPATH%;%IOTDB_CLI_HOME%\lib\*
> 
> Best,
> --
> Jialin Qiao
> School of Software, Tsinghua University
> 
> 乔嘉林
> 清华大学 软件学院
> 
> -----原始邮件-----
> 发件人: "Zesong Sun" <[email protected]>
> 发送时间: 2019-09-04 22:20:54 (星期三)
> 收件人: dev <[email protected]>
> 抄送:
> 主题: Resolve "input line is too long" in windows os
> 
> Hi,
> 
> 
> 
> 
> Recently I have encountered a problem when updating maven dependency in 
> tsfile module: when starting client in windows os, I will get an error: "The 
> input line is too long."
> 
> 
> It is resulted by limitation of the maximum length of the string that can be 
> used at the command line: "On computers running Microsoft Windows XP or 
> later, the maximum length of the string that you can use at the command 
> prompt is 8191 characters. On computers running Microsoft Windows 2000 or 
> Windows NT 4.0, the maximum length of the string that you can use at the 
> command prompt is 2047 characters. This limitation applies to the command 
> line, individual environment variables (such as the PATH variable) that are 
> inherited by other processes, and all environment variable expansions. If you 
> use Command Prompt to run batch files, this limitation also applies to batch 
> file processing.” [1]
> 
> 
> With the suggestion of @Jialin Qiao, I reduced the dependency (from 
> hadoop-client to hadoop-common), and local tests are all passed. However, the 
> tests on Travis CI still failed.
> 
> 
> Thanks to @Tian Jiang, I changed the set CLASSPATH statement in .bat file of 
> starting client:
> 
> 
> Previous:
> ```
> for %%i in ("%IOTDB_CLI_HOME%\lib\*.jar") do call :append "%%i"
> goto okClasspath
> 
> 
> :append
> set CLASSPATH=%CLASSPATH%;%1
> goto :eof
> 
> ```
> 
> 
> And  now:
> ```
> set CLASSPATH=%IOTDB_CLI_HOME%\lib\*
> ```
> 
> 
> This avoid too long input line of CLASSPATH, which resolves the problem.
> 
> 
> The error confused me for really a long time... And I think maybe this 
> solution will help you in the future. If you have any other suggestions and 
> ideas, welcome to discuss with us : )
> 
> 
> 
> 
> [1] 
> https://support.microsoft.com/en-us/help/830473/command-prompt-cmd-exe-command-line-string-limitation
> 
> 
> 
> 
> 
> BR,
> ------------------
> Zesong Sun
> School of Software, Tsinghua University
> 
> 孙泽嵩
> 清华大学 软件学院

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