Failed to connect to Elasticsearch.
java.io.IOException: username:[email protected]: invalid IPv6 address
        at org.elasticsearch.client.RestClient.extractAndWrapCause(RestClient.java:884)
        at org.elasticsearch.client.RestClient.performRequest(RestClient.java:283)
        at org.elasticsearch.client.RestClient.performRequest(RestClient.java:270)
        at com.inversoft.maintenance.search.ElasticsearchMaintenanceModeSearchService.testConnection(ElasticsearchMaintenanceModeSearchService.java:174)
        at com.inversoft.maintenance.search.ElasticsearchMaintenanceModeSearchService.determineSearchStatus(ElasticsearchMaintenanceModeSearchService.java:67)
        at com.inversoft.maintenance.MaintenanceModeThreadSafeHelper.areWeDoneYet(MaintenanceModeThreadSafeHelper.java:50)
        at com.inversoft.maintenance.MaintenanceModePoller.lambda$new$1(MaintenanceModePoller.java:46)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
        at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
        at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.net.UnknownHostException: username:[email protected]: invalid IPv6 address
        at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1331)
        at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1288)
        at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)
        at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalAddressResolver.resolveRemoteAddress(PoolingNHttpClientConnectionManager.java:664)
        at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalAddressResolver.resolveRemoteAddress(PoolingNHttpClientConnectionManager.java:635)
        at org.apache.http.nio.pool.AbstractNIOConnPool.processPendingRequest(AbstractNIOConnPool.java:474)
        at org.apache.http.nio.pool.AbstractNIOConnPool.lease(AbstractNIOConnPool.java:280)
        at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.requestConnection(PoolingNHttpClientConnectionManager.java:295)
        at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.requestConnection(AbstractClientExchangeHandler.java:377)
        at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.start(DefaultClientExchangeHandlerImpl.java:129)
        at org.apache.http.impl.nio.client.InternalHttpAsyncClient.execute(InternalHttpAsyncClient.java:141)
        at org.elasticsearch.client.RestClient.performRequest(RestClient.java:279)
        ... 11 common frames omitted