GududeDog opened a new pull request, #23131:
URL: https://github.com/apache/flink/pull/23131
Explanation of Asynchronous Problem in Querying Data from HBase
When sync is not enabled, the HBaseRowDataLookupFunction object will be
created. When entering this method, you notice that an HTable table is
declared, but it is not immediately assigned. Instead, it is assigned in the
open method. In actual development, a connection object is created in the open
method, which is secure. If used, it will be closed. If it is a Table object,
it is not safe. It is recommended to turn it off after using it. However, in
the code, it can be seen that it is created in the open method and closed in
the close method. If the data source continues to come, the close method will
not execute. If it is a connected object, it is not a problem. If it is a table
object, using the same object when processing each piece of data will cause
problems. In the lookup method, if you want to query data in HBase, you must
first create an object called the table get (get) method. When querying data,
you use the same data, which may result in inaccurate data. If it is multit
hreaded, it will be unsafe
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