jamesvsshark opened a new issue, #246:
URL: https://github.com/apache/pulsar-client-python/issues/246
There is a compatibility issue between the Pulsar Python client library
version 3.6.0 and Pulsar server version 4.0.2 when used in Databricks.
**Observed Issue**
> Pulsar Client Library Version: 3.5.0
> Environment: Databricks notebook
> Problem: Unable to connect and create a client.

**Error Details**
When using Pulsar client library version 3.6.0 in Databricks, the following
error is encountered:
`0000-00-00 00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO
[ERROR:__main__:Error connecting to Pulsar: Pulsar error: ConnectError
0000-00-00 00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO [0000-00-00
00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO
[0000-00-00 00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO [0000-00-00
00:00:00.000 ERROR [0000-00-00 00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO
[0000-00-00 00:00:00.000 INFO [0000-00-00 00:00:00.000 INFO [0000-00-00
00:00:00.000 INFO [`
**Solution**
Downgrading to Pulsar client library version 3.5.0 resolves the issue.
> Current Pulsar Server Version: 4.0.2
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