Liquibase migration run from java code never ends because of number of living non-daemon threads

[Jenya95]

I've created project that reproduces my issue at https://github.com/Jenya95/liquibase-cassandra-issue
I'm using liquibase directly from java to create objects in database. For other types of database it works well, but for cassandra - program never ends because of number of living non-daemon threads. Close connection did not help.
Log like this: (pay attention on threads at the end of log):

[main] INFO com.datastax.oss.driver.internal.core.DefaultMavenCoordinates - DataStax Java driver for Apache Cassandra(R) (com.datastax.oss:java-driver-core) version 4.8.0
[s0-admin-0] INFO com.datastax.oss.driver.internal.core.time.Clock - Using native clock for microsecond precision
[s0-io-2] WARN com.datastax.oss.driver.api.core.auth.PlainTextAuthProviderBase - [] localhost/127.0.0.1:9042 did not send an authentication challenge; This is suspicious because the driver expects authentication
[s0-io-3] WARN com.datastax.oss.driver.api.core.auth.PlainTextAuthProviderBase - [] localhost/127.0.0.1:9042 did not send an authentication challenge; This is suspicious because the driver expects authentication
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Sep 29, 2021 10:55:14 AM liquibase.ext
INFO: No DATABASECHANGELOGLOCK available in cassandra.
Sep 29, 2021 10:55:14 AM liquibase.ext
INFO: successfully.acquired.change.log.lock
Sep 29, 2021 10:55:14 AM liquibase.ext
WARNING: expecting exactly 1 table with name DATABASECHANGELOG, got 0
Sep 29, 2021 10:55:14 AM liquibase.ext
INFO: Creating database history table with name: sample.DATABASECHANGELOG
Sep 29, 2021 10:55:14 AM liquibase.ext
INFO: Reading from sample.DATABASECHANGELOG
Sep 29, 2021 10:55:15 AM liquibase.changelog
INFO: SQL in file scripts/sample_table.cql executed
Sep 29, 2021 10:55:15 AM liquibase.changelog
INFO: ChangeSet cassandra-scheme/changesets/sample-table-init-1.0.xml::create_sample_table::me ran successfully in 65ms
Sep 29, 2021 10:55:15 AM liquibase.ext
INFO: Successfully released change log lock
[Thread-35] INFO com.sample.LiquibaseApp - ----------------------------
[Thread-35] INFO com.sample.LiquibaseApp - Threads prevent to stop jvm:
[Thread-35] INFO com.sample.LiquibaseApp - 80:cluster3-connection-reaper-0
[Thread-35] INFO com.sample.LiquibaseApp - 127:cluster5-nio-worker-0
[Thread-35] INFO com.sample.LiquibaseApp - 120:cluster4-nio-worker-0
[Thread-35] INFO com.sample.LiquibaseApp - 123:cluster4-worker-0
[Thread-35] INFO com.sample.LiquibaseApp - 146:cluster7-worker-0
[Thread-35] INFO com.sample.LiquibaseApp - 184:DestroyJavaVM
...

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