Impala Questions--1--connection pooling and memory allocation

Exception information feature Word:

Admission for query exceeded timeout 60000ms

Reason:

Wait time timed out, more than 10 minutes

Cause: There are two types, there will be memory estimates and queues are not empty, etc., but the core reasons are as follows
Connection pool full, query request waits for connection pool assignment timed out Impala memory usage is full, the memory required by the query makes the amount of memory used exceeds the cluster resource

This type of error is related to the degree of tension in computing resources, and it is best to retry if such a problem occurs while writing the program.