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new b1267c1e25 Issue #8755 : Keep the PostgreSQL driver off the shared
classpath (#8828)
b1267c1e25 is described below
commit b1267c1e25700d05c5b51458a4a2f212abe4be9e
Author: Matt Casters <[email protected]>
AuthorDate: Fri Oct 9 18:08:30 2026 +0200
Issue #8755 : Keep the PostgreSQL driver off the shared classpath (#8828)
The Beam assembly copied debezium-connector-postgres and its PostgreSQL
driver into lib/core. The integration-test client loads that folder on
the application classpath, so DriverManager returns a PgConnection the
database plugin cannot cast to its own PGConnection.
---
plugins/engines/beam/pom.xml | 4 +++-
plugins/engines/beam/src/assembly/assembly.xml | 9 +++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/plugins/engines/beam/pom.xml b/plugins/engines/beam/pom.xml
index dd34394acf..ef6f40d320 100644
--- a/plugins/engines/beam/pom.xml
+++ b/plugins/engines/beam/pom.xml
@@ -305,7 +305,9 @@
</exclusion>
</exclusions>
</dependency>
- <!-- DebeziumIO provides the CDC source but not a database connector.
-->
+ <!-- DebeziumIO provides the CDC source but not a database connector.
+ Packaged with its PostgreSQL driver under
plugins/engines/beam/lib, not lib/core.
+ A driver on the application classpath breaks PostgreSQL Bulk
Loader. -->
<dependency>
<groupId>io.debezium</groupId>
<artifactId>debezium-connector-postgres</artifactId>
diff --git a/plugins/engines/beam/src/assembly/assembly.xml
b/plugins/engines/beam/src/assembly/assembly.xml
index 7c4d140093..e8d0af5f38 100644
--- a/plugins/engines/beam/src/assembly/assembly.xml
+++ b/plugins/engines/beam/src/assembly/assembly.xml
@@ -91,6 +91,13 @@
Snowflake IO jar that loads it, off the shared lib/core
classpath. -->
<exclude>org.apache.beam:beam-sdks-java-io-snowflake</exclude>
<exclude>net.snowflake:snowflake-jdbc</exclude>
+ <!-- debezium-connector-postgres pulls
org.postgresql:postgresql. A copy of that
+ driver on lib/core is loaded by the application
classloader, so DriverManager
+ returns a PgConnection the database plugin cannot cast to
its own
+ PGConnection (PostgreSQL Bulk Loader). Keep the connector
and its driver in
+ the Beam plugin classloader. -->
+ <exclude>io.debezium:debezium-connector-postgres</exclude>
+ <exclude>org.postgresql:postgresql</exclude>
</excludes>
<outputDirectory>lib/core</outputDirectory>
</dependencySet>
@@ -101,6 +108,8 @@
<includes>
<include>org.apache.beam:beam-sdks-java-io-snowflake:jar</include>
<include>net.snowflake:snowflake-jdbc:jar</include>
+ <include>io.debezium:debezium-connector-postgres:jar</include>
+ <include>org.postgresql:postgresql:jar</include>
</includes>
<outputDirectory>plugins/engines/beam/lib</outputDirectory>
</dependencySet>
