SDK timed out with message 'KV SASL Negotiation timed out after 5000ms'

ExecutionException: java.util.concurrent.ExecutionException: reactor.core.Exceptions$ReactiveException: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 5000ms in 'ignoreThen' (and no fallback has been configured)

[WARN ] 2019-07-23 15:08:19.194 [cb-events] endpoint - [com.couchbase.endpoint][EndpointConnectionFailedEvent][5000000µs] Connect attempt 1 failed because of TimeoutException: Did not observe any item or terminal signal within 5000ms in 'source(MonoDefer)' (and no fallback has been configured) {"bucket":"default","circuitBreaker":"DISABLED","coreId":580,"remote":"10.112.191.101:11210","type":"KV"}

[ERROR] 2019-07-23 15:08:19.196 [cb-io-kv-2321-1] Operators - Operator called default onErrorDropped

java.util.concurrent.TimeoutException: KV SASL Negotiation timed out after 5000ms

    at com.couchbase.client.core.io.netty.kv.SaslAuthenticationHandler.lambda$channelActive$1(SaslAuthenticationHandler.java:164) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.concurrent.PromiseTask$RunnableAdapter.call(PromiseTask.java:38) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:127) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:416) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.channel.kqueue.KQueueEventLoop.run(KQueueEventLoop.java:293) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [core-io-2.0.0-alpha.5.jar:?]

    at com.couchbase.client.core.deps.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [core-io-2.0.0-alpha.5.jar:?]

    at java.lang.Thread.run(Thread.java:844) [?:?]

[DEBUG] 2019-07-23 15:08:19.299 [cb-events] io - [com.couchbase.io][FeaturesNegotiatedEvent][526µs] Negotiated [XATTR, XERROR, SELECT_BUCKET, SNAPPY, ALT_REQUEST, SYNC_REPLICATION, COLLECTIONS] {"bucket":"default","coreId":580,"remote":"10.112.191.101/10.112.191.101:11210","local":"/10.112.191.1:58323"}

[DEBUG] 2019-07-23 15:08:19.299 [cb-events] io - [com.couchbase.io][ErrorMapLoadedEvent][702µs] KV Error Map successfully loaded. Map Version: 1, Revision: 2 {"bucket":"default","coreId":580,"remote":"10.112.191.101/10.112.191.101:11210","local":"/10.112.191.1:58323"}

[DEBUG] 2019-07-23 15:08:19.299 [cb-events] io - [com.couchbase.io][SaslMechanismsSelectedEvent] SASL Mechanism SCRAM_SHA512 selected. Server: [SCRAM_SHA1, SCRAM_SHA512, SCRAM_SHA256, PLAIN], Allowed: [PLAIN, CRAM_MD5, SCRAM_SHA1, SCRAM_SHA256, SCRAM_SHA512] {"bucket":"default","coreId":580,"remote":"10.112.191.101/10.112.191.101:11210","local":"/10.112.191.1:58323"}

[DEBUG] 2019-07-23 15:08:19.299 [cb-events] io - [com.couchbase.io][SaslAuthenticationCompletedEvent][6709µs] SASL Authentication completed {"bucket":"default","coreId":580,"remote":"10.112.191.101/10.112.191.101:11210","local":"/10.112.191.1:58323"}

bucket_param_tests.dgm.Bucket_DGM_Tests.test_dgm_to_non_dgm,nodes_init=3,num_items=10000,doc_size=1024,active_resident_threshold=80,replicas=1,sdk_timeout=60,bucket_size=100