Stamatis Zampetakis created HIVE-25705:
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Summary: Use dynamic host/post binding for dockerized databases in
tests
Key: HIVE-25705
URL: https://issues.apache.org/jira/browse/HIVE-25705
Project: Hive
Issue Type: Improvement
Components: Testing Infrastructure
Reporter: Stamatis Zampetakis
Assignee: Stamatis Zampetakis
Currently all dockerized databases (subclasses of
[DatabaseRule|https://github.com/apache/hive/blob/6e02f6164385a370ee8014c795bee1fa423d7937/standalone-metastore/metastore-server/src/test/java/org/apache/hadoop/hive/metastore/dbinstall/rules/DatabaseRule.java],
subclasses of
[AbstractExternalDB.java|https://github.com/apache/hive/blob/6e02f6164385a370ee8014c795bee1fa423d7937/itests/util/src/main/java/org/apache/hadoop/hive/ql/externalDB/AbstractExternalDB.java])
are mapped statically to a specific hostname (usually localhost) and port when
the container is launched; the host/port values are hardcoded in the code.
This may create problems when a certain port is already taken by another
process leading to errors like the one below:
{noformat}
Bind for 0.0.0.0:5432 failed: port is already allocated.
{noformat}
Similar problems can occur by assuming that every database will be accessible
on localhost.
This can lead to flakiness in CI and/or poor developer experience when running
tests backed by Docker.
The goal of this case is to allow the containers/databases bind dynamically to
a random port at startup and expose the appropriate IP address & port to the
tests relying on these databases.
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