大叔问题定位分享（31）hive metastore报错

hive metastore在建表时报错

[pool-5-thread-2]: MetaException(message:Got exception: java.net.ConnectException Call From server2 to server1:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused)

其中server1:8020是namenode，但是正常的namenode是server2:8020，为什么会连接一个不存在的namenode？
检查cdh hive的启动过程中使用的conf目录：

using /opt/cloudera/parcels/CDH-5.16.1-1.cdh5.16.1.p0.3/lib/hive as HIVE_HOME
using /opt/cloudera-manager/cm-5.16.1/run/cloudera-scm-agent/process/245-hive-HIVEMETASTORE as HIVE_CONF_DIR
using /opt/cloudera/parcels/CDH-5.16.1-1.cdh5.16.1.p0.3/lib/hadoop as HADOOP_HOME
using /opt/cloudera-manager/cm-5.16.1/run/cloudera-scm-agent/process/245-hive-HIVEMETASTORE/yarn-conf as HADOOP_CONF_DIR

这些目录中都是正常的namenode配置，忽然想到数据库中会保存hdfs路径，

mysql> select db_location_uri from DBS;

果然是这里存储的hdfs路径有问题，修改之后正常；