无法在Apache Airflow中设置DB2/DashDB JDBC连接 [英] Unable to setup a DB2 / DashDB JDBC Connection in Apache Airflow

问题描述

我正在尝试使用Airflow UI创建DB2/DashDB连接.我添加了db2jcc4.jar驱动程序，并提供了路径以及类名com.ibm.db2.jcc.DB2Driver.class

I'm trying to create a DB2 / DashDB connection using the Airflow UI. I have added the db2jcc4.jar driver and provided the path as well as the class name com.ibm.db2.jcc.DB2Driver.class

我试图运行一个简单的查询(在临时用户界面中)，并且总是得到相同的错误

I tried to run a simple query (in the ad hoc UI) and always get the same error

java.lang.RuntimeException:找不到类com.ibm.db2.jcc.DB2Driver.class

java.lang.RuntimeException: Class com.ibm.db2.jcc.DB2Driver.class not found

有人需要在Apache Airflow中建立DB2/DashDB连接吗?

Did anybody need to setup a DB2 / DashDB connection in Apache Airflow before?

在网络上什么都没找到.

Found nothing on the web about that.

谢谢

推荐答案

如果您还没有弄清楚这一点，我就会遇到同样的问题.

If you haven't still figured this out, I ran into same problem.

经过一些调试，我发现这里的文件jdbc_hook.py https://github.com/apache/incubator-airflow/blob/master/airflow/hooks/jdbc_hook.py#L55 缺少jaydebeapi.connect方法调用中预期的1个参数.

With some debugging I came to find that the file jdbc_hook.py here https://github.com/apache/incubator-airflow/blob/master/airflow/hooks/jdbc_hook.py#L55 is missing 1 parameter expected in the jaydebeapi.connect method call.

特别是缺少第二个参数，该参数应该是连接的URL.

In particular is missing the second parameter, which should be the URL of the connection.

我将方法get_conn中的代码更改为以下代码以进行尝试，并且成功了.

I changed the code inside the method get_conn to the following to try out, and it worked.

  def get_conn(self):
    ......

    conn = jaydebeapi.connect(jdbc_driver_name,
                             host,
                      driver_args=[str(login), str(psw)],
                              jars=jdbc_driver_loc)
    return conn    

请注意将host添加到对jaydebeapi.connect的调用中.

Notice the host added to the call to jaydebeapi.connect.

我当时想开一家公关公司，但随后进行审查，发现它们已经在几个地方有了(在Airflow的公关公司中搜索jdbc):

I was thinking of opening a PR, but then reviewing, they have already something in a couple of places (search for jdbc in Airflow's PRs):

https://github.com/apache/incubator-airflow/pull/2227

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