[MaintenanceTimer-2-thread-1] WARN  org.mongodb.driver.connection - Exception thrown during connection pool background maintenance task
com.mongodb.MongoSocketException: <host_name_of_read_replica>
	at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:211)
	at com.mongodb.connection.netty.NettyStream.openAsync(NettyStream.java:109)
	at com.mongodb.connection.netty.NettyStream.open(NettyStream.java:103)
	at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:128)
	at com.mongodb.internal.connection.UsageTrackingInternalConnection.open(UsageTrackingInternalConnection.java:50)
	at com.mongodb.internal.connection.DefaultConnectionPool$UsageTrackingInternalConnectionItemFactory.create(DefaultConnectionPool.java:530)
	at com.mongodb.internal.connection.DefaultConnectionPool$UsageTrackingInternalConnectionItemFactory.create(DefaultConnectionPool.java:518)
	at com.mongodb.internal.connection.ConcurrentPool.createNewAndReleasePermitIfFailure(ConcurrentPool.java:181)
	at com.mongodb.internal.connection.ConcurrentPool.ensureMinSize(ConcurrentPool.java:175)
	at com.mongodb.internal.connection.DefaultConnectionPool$3.run(DefaultConnectionPool.java:317)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.net.UnknownHostException: <host_name_of_read_replica>
	at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:797)
	at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:883)
	at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1505)
	at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1364)
	at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1298)
	at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:203)
	at com.mongodb.connection.netty.NettyStream.openAsync(NettyStream.java:109)
	at com.mongodb.connection.netty.NettyStream.open(NettyStream.java:103)
	at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:128)
	at com.mongodb.internal.connection.UsageTrackingInternalConnection.open(UsageTrackingInternalConnection.java:50)
	at com.mongodb.internal.connection.DefaultConnectionPool$UsageTrackingInternalConnectionItemFactory.create(DefaultConnectionPool.java:530)
	at com.mongodb.internal.connection.DefaultConnectionPool$UsageTrackingInternalConnectionItemFactory.create(DefaultConnectionPool.java:518)
	at com.mongodb.internal.connection.ConcurrentPool.createNewAndReleasePermitIfFailure(ConcurrentPool.java:181)
	at com.mongodb.internal.connection.ConcurrentPool.ensureMinSize(ConcurrentPool.java:175)
	at com.mongodb.internal.connection.DefaultConnectionPool$3.run(DefaultConnectionPool.java:317)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)