diff --git a/build/docker/Dockerfile b/build/docker/Dockerfile
index eab3d9da737ba..21868cc8b15c9 100644
--- a/build/docker/Dockerfile
+++ b/build/docker/Dockerfile
@@ -17,7 +17,7 @@
 # under the License.
 #
 
-FROM ubuntu:22.04
+FROM ubuntu:20.04
 
 # prepare the directory for pulsar related files
 RUN mkdir /pulsar
diff --git a/docker/pulsar/Dockerfile b/docker/pulsar/Dockerfile
index 1f543111201aa..6450668ccd2be 100644
--- a/docker/pulsar/Dockerfile
+++ b/docker/pulsar/Dockerfile
@@ -49,7 +49,7 @@ RUN chmod g+w /pulsar/lib/presto
 ### Create 2nd stage from Ubuntu image
 ### and add OpenJDK and Python dependencies (for Pulsar functions)
 
-FROM ubuntu:22.04
+FROM ubuntu:20.04
 
 ARG DEBIAN_FRONTEND=noninteractive
 ARG UBUNTU_MIRROR=mirror://mirrors.ubuntu.com/mirrors.txt
diff --git a/docker/pulsar/scripts/install-pulsar-client.sh b/docker/pulsar/scripts/install-pulsar-client.sh
index 56702b10db3d8..b4b2ec8ac2d43 100755
--- a/docker/pulsar/scripts/install-pulsar-client.sh
+++ b/docker/pulsar/scripts/install-pulsar-client.sh
@@ -21,5 +21,9 @@
 set -x
 
 PYTHON_MAJOR_MINOR=$(python3 -V | sed -E 's/.* ([[:digit:]]+)\.([[:digit:]]+).*/\1\2/')
+echo $PYTHON_MAJOR_MINOR
+ls /pulsar/pulsar-client
+uname -a
 WHEEL_FILE=$(ls /pulsar/pulsar-client | grep "cp${PYTHON_MAJOR_MINOR}")
+echo WHEEL_FILE=$WHEEL_FILE
 pip3 install /pulsar/pulsar-client/${WHEEL_FILE}[all]
diff --git a/tests/docker-images/java-test-image/Dockerfile b/tests/docker-images/java-test-image/Dockerfile
index d712c83a425b6..b7f12b75968a1 100644
--- a/tests/docker-images/java-test-image/Dockerfile
+++ b/tests/docker-images/java-test-image/Dockerfile
@@ -17,7 +17,7 @@
 # under the License.
 #
 
-FROM ubuntu:22.04
+FROM ubuntu:20.04
 
 RUN groupadd -g 10001 pulsar
 RUN adduser -u 10000 --gid 10001 --disabled-login --disabled-password --gecos '' pulsar