Canary test failed to establish a connection or a client session to the ZooKeeper

Canary test failed to establish a connection or a client session to the ZooKeeper

RN ZooKeeperHiveLockManager: Unexpected ZK exception when creating parent node /hive_zookeeper_namespace_hive org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hive_zookeeper_namespace_hive at org.apache.zookeeper.KeeperException.create(KeeperException.java:99) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783) at org.apache.hadoop.hive.ql.lockmgr.zookeeper.ZooKeeperHiveLockManager.setContext(ZooKeeperHiveLockManager.java:120) at org.apache.hadoop.hive.ql.lockmgr.DummyTxnManager.getLockManager(DummyTxnManager.java:71) at org.apache.hadoop.hive.ql.lockmgr.DummyTxnManager.acquireLocks(DummyTxnManager.java:100) at org.apache.hadoop.hive.ql.Driver.acquireReadWriteLocks(Driver.java:918) at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1128) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:962) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:957) at org.apache.hive.service.cli.operation.SQLOperation.runInternal(SQLOperation.java:145) at org.apache.hive.service.cli.operation.SQLOperation.access$000(SQLOperation.java:69) at org.apache.hive.service.cli.operation.SQLOperation$1$1.run(SQLOperation.java:200) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1642)

solution: restart the cluster or restart the zookeeper and hive service.