namenode两次崩溃，没有任何消息，我在日志中找不到问题。
第一次崩溃：
2018-11-27 11:59:56,952 INFO org.apache.hadoop.hdfs.server.namenode.FSEditLog: Starting log segment at 23543616
2018-11-27 12:00:22,052 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1076425954_2685150{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-7140ff02-6549-465b-87ce-d5f403436558:NORMAL:192.168.26.158:50010|RBW], ReplicaUC[[DISK]DS-6bc7ab93-4249-4d27-b0fd-8a45db3f270f:NORMAL:192.168.26.159:50010|RBW], ReplicaUC[[DISK]DS-a2994b60-5b11-40bc-9954-8be218b1f3fb:NORMAL:192.168.26.157:50010|RBW]]} for /user/root/.sparkStaging/application_1542364426928_9542/__spark_libs__5755599030092568954.zip
2018-11-27 12:00:22,062 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1076425955_2685151{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-6bc7ab93-4249-4d27-b0fd-8a45db3f270f:NORMAL:192.168.26.159:50010|RBW], ReplicaUC[[DISK]DS-7140ff02-6549-465b-87ce-d5f403436558:NORMAL:192.168.26.158:50010|RBW], ReplicaUC[[DISK]DS-a2994b60-5b11-40bc-9954-8be218b1f3fb:NORMAL:192.168.26.157:50010|RBW]]} for /user/root/.sparkStaging/application_1542364426928_9539/__spark_libs__2307359704436425631.zip
2018-11-27 12:00:22,083 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1076425956_2685152{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-6bc7ab93-4249-4d27-b0fd-8a45db3f270f:NORMAL:192.168.26.159:50010|RBW], ReplicaUC[[DISK]DS-7140ff02-6549-465b-87ce-d5f403436558:NORMAL:192.168.26.158:50010|RBW], ReplicaUC[[DISK]DS-a2994b60-5b11-40bc-9954-8be218b1f3fb:NORMAL:192.168.26.157:50010|RBW]]} for /user/root/.sparkStaging/application_1542364426928_9541/__spark_libs__1328747852487387076.zip
2018-11-27 12:00:22,120 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1076425957_2685153{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-6bc7ab93-4249-4d27-b0fd-8a45db3f270f:NORMAL:192.168.26.159:50010|RBW], ReplicaUC[[DISK]DS-a2994b60-5b11-40bc-9954-8be218b1f3fb:NORMAL:192.168.26.157:50010|RBW], ReplicaUC[[DISK]DS-7140ff02-6549-465b-87ce-d5f403436558:NORMAL:192.168.26.158:50010|RBW]]} for /user/root/.sparkStaging/application_1542364426928_9543/__spark_libs__8248392950958383504.zip
2018-11-27 12:00:22,156 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1076425958_2685154{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-6bc7ab93-4249-4d27-b0fd-8a45db3f270f:NORMAL:192.168.26.159:50010|RBW], ReplicaUC[[DISK]DS-a2994b60-5b11-40bc-9954-8be218b1f3fb:NORMAL:192.168.26.157:50010|RBW], ReplicaUC[[DISK]DS-7140ff02-6549-465b-87ce-d5f403436558:NORMAL:192.168.26.158:50010|RBW]]} for /user/root/.sparkStaging/application_1542364426928_9544/__spark_libs__2669823423152712304.zip
2018-11-27 12:32:11,497 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: STARTUP_MSG: