When we are conneting the Amplitude we got the following error:

ERROR[m i.a.i.d.b.BufferedStreamConsumer(close):219 - {} - Close failed.
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - org.postgresql.util.PSQLException: An I/O error occurred while sending to the backend.
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:350) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:473) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:393) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:322) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:308) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:284) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:279) ~[postgresql-42.2.18.jar:42.2.18]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:194) ~[commons-dbcp2-2.7.0.jar:2.7.0]
[35mdestination[0m - 2021-11-29 08:30:33 INFO DefaultAirbyteStreamFactory(lambda$create$0):61 - 	at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:194) ~[commons-dbcp2-2.7.0.jar:2.7.0]
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - Exception in thread "main" org.postgresql.util.PSQLException: An I/O error occurred while sending to the backend.
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:350)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:473)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:393)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:322)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:308)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:284)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:279)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:194)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:194)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at io.airbyte.db.jdbc.JdbcDatabase.lambda$execute$0(JdbcDatabase.java:40)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at io.airbyte.db.jdbc.DefaultJdbcDatabase.execute(DefaultJdbcDatabase.java:52)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at io.airbyte.db.jdbc.JdbcDatabase.execute(JdbcDatabase.java:40)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at io.airbyte.integrations.destination.jdbc.JdbcSqlOperations.executeTransaction(JdbcSqlOperations.java:95)
[35mdestination[0m - 2021-11-29 08:30:33 ERROR LineGobbler(voidCall):82 - 	at io.airbyte.integrations.destination.jdbc.JdbcBufferedConsumerFactory.lambda$onCloseFunction$3(JdbcBufferedConsumerFactory.java:179)

Hello @Anton Svetlov looks this is an issue in a connection. Could you post in the #troubleshooting channel using the template? See one example here: https://docs.airbyte.io/troubleshooting#slack-issue-template Only with your log is not clear what is the root cause of the problem.