Confluence Cloud Migration Assistant scoped user groups and performance issue

2022-01-25 09:49:19,161 ERROR [http-nio-8090-exec-1026] [common.error.jersey.ThrowableExceptionMapper] toResponse Uncaught exception thrown by REST service: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connection was closed in SingleConnectionDataSource. Check that user code checks shouldClose() before closing Connections, or set 'suppressClose' to 'true'
 -- referer: https://confluence.example.com/admin/migration.action?& | url: /rest/migration/latest/stats/usersGroups | traceId: 420a2cdad91619af | userName: user1@example.com
com.google.common.util.concurrent.UncheckedExecutionException: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connection was closed in SingleConnectionDataSource. Check that user code checks shouldClose() before closing Connections, or set 'suppressClose' to 'true'
.
Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connection was closed in SingleConnectionDataSource. Check that user code checks shouldClose() before closing Connections, or set 'suppressClose' to 'true'
.
Caused by: java.sql.SQLException: Connection was closed in SingleConnectionDataSource. Check that user code checks shouldClose() before closing Connections, or set 'suppressClose' to 'true'

2022-02-23 13:49:08,992 ERROR [Caesium-1-4] [agent.service.check.AsyncCheckExecutor] 
error Couldn't execute check of type InvalidEmails with id 99452c0a202608e5fe312baee9dd55268481d775
com.google.common.util.concurrent.UncheckedExecutionException: org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [SELECT BODY FROM BODYCONTENT WHERE BODY LIKE '%ri:userkey%' AND CONTENTID IN (SELECT CONTENTID FROM CONTENT WHERE SPACEID = ?
UNION
SELECT CONTENTID FROM CONTENT WHERE CONTENTTYPE = 'COMMENT' AND PAGEID IN (SELECT CONTENTID FROM CONTENT WHERE SPACEID = ?)
UNION
SELECT CONTENTID FROM CONTENT WHERE PAGEID IN (SELECT CONTENTID FROM CONTENT WHERE CONTENTTYPE = 'COMMENT' AND PAGEID IN (SELECT CONTENTID FROM CONTENT WHERE SPACEID = ?))
UNION
SELECT CONTENTID FROM CONTENT WHERE SPACEID is null AND PREVVER IN (SELECT CONTENTID FROM CONTENT WHERE SPACEID = ?)
UNION
SELECT CONTENTID FROM CONTENT WHERE CONTENTTYPE = 'COMMENT' AND PREVVER IN (SELECT CONTENTID FROM CONTENT WHERE CONTENTTYPE = 'COMMENT' AND PAGEID IN (SELECT CONTENTID FROM CONTENT WHERE SPACEID = ?)))]; SQL state [72000]; error code [1555]; ORA-01555: snapshot too old: rollback segment number with name "" too small
ORA-22924: snapshot too old
; nested exception is java.sql.SQLException: ORA-01555: snapshot too old: rollback segment number with name "" too small
ORA-22924: snapshot too old