我用 HDP 2.5 建立了一个新的 Hadoop 集群（包含 6 台机器）。安装运行良好，最初的几分钟似乎一切正常。但几分钟后，两个 HBase 服务停止工作：
- HBase / host1.mydomain.de
- HBase 主进程：连接失败 [Errno 111] 连接到 host1.mydomain.de
- HBase / host6.mydomain.de
- HBase RegionServer 进程：连接失败 [Errno 111] 拒绝连接到 host6.mydomain.de
当我搜索这个问题时，我发现了这些提示：
- 检查并启用NTPD（安装前启用，仍然禁用）
- 检查并禁用防火墙（安装前禁用，仍然禁用）
- 检查并禁用 SELinux（安装前禁用，仍然禁用）
关键是，所有服务一开始都在运行，所以上面列出的服务应该配置正确！
我可以对我的集群配置说以下内容：
- Ambari-Server 主机 (host1) 可以通过 ping 访问所有其他主机，并且可以通过 SSH 无密码连接
- 安装的组件有 HDFS、YARN、MR2、Tez、Hive、HBase、Pig、ZooKeeper、AmbariMetrics、Knox、Spark、Slider
- 我在安装过程中保留了所有默认设置，并且忽略了以下警告：
日志文件/var/log/hbase/hbase-hbase-master-host1.domain.de.log包含以下片段（IP 地址被 aaaa / bbbb / xxxx / yyyy / zzzz 涂黑）：
2016-11-22 18:50:53,007 INFO [master/host1.xxx.de/xxx.xxx.xxx.xxx:16000] client.ZooKeeperRegistry: ClusterId read in ZooKeeper is null
2016-11-22 18:51:59,581 INFO [Thread-70] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as bbb.bbb.bbb.bbb:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:51:59,584 INFO [Thread-70] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741825_1001
2016-11-22 18:51:59,597 INFO [Thread-70] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[bbb.bbb.bbb.bbb:50010,DS-7691d8f6-0c76-4780-9836-85f20f935dd6,DISK]
2016-11-22 18:52:33,674 INFO [Thread-70] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as zzz.zzz.zzz.zzz:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:52:33,675 INFO [Thread-70] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741837_1013
2016-11-22 18:52:33,683 INFO [Thread-70] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[zzz.zzz.zzz.zzz:50010,DS-15d2586e-09a9-41ed-898d-689e15cd6596,DISK]
2016-11-22 18:52:33,771 WARN [host1:16000.activeMasterManager] hdfs.DFSClient: Slow waitForAckedSeqno took 100584ms (threshold=30000ms)
2016-11-22 18:52:33,797 INFO [host1:16000.activeMasterManager] util.FSUtils: Created version file at hdfs://host1.xxx.de:8020/apps/hbase/data with version=8
2016-11-22 18:52:36,820 INFO [Thread-76] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as yyy.yyy.yyy.yyy:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:52:36,821 INFO [Thread-76] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741843_1019
2016-11-22 18:52:36,828 INFO [Thread-76] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[yyy.yyy.yyy.yyy:50010,DS-439b87d1-f08d-464c-b0e2-728987cd211d,DISK]
2016-11-22 18:52:37,567 INFO [Thread-76] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as zzz.zzz.zzz.zzz:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:52:37,567 INFO [Thread-76] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741845_1021
2016-11-22 18:52:37,575 INFO [Thread-76] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[zzz.zzz.zzz.zzz:50010,DS-15d2586e-09a9-41ed-898d-689e15cd6596,DISK]
2016-11-22 18:52:40,589 INFO [Thread-76] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as aaa.aaa.aaa.aaa:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:52:40,589 INFO [Thread-76] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741846_1022
2016-11-22 18:52:40,593 INFO [Thread-76] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[aaa.aaa.aaa.aaa:50010,DS-15ea9223-2b1b-4f86-8797-ff0e2aaa6787,DISK]
2016-11-22 18:52:40,694 INFO [host1:16000.activeMasterManager] master.MasterFileSystem: BOOTSTRAP: creating hbase:meta region
2016-11-22 18:52:40,699 INFO [host1:16000.activeMasterManager] regionserver.HRegion: creating HRegion hbase:meta HTD == 'hbase:meta', {TABLE_ATTRIBUTES => {IS_META => 'true', coprocessor$1 => '|org.apache.hadoop.hbase.coprocessor.Mul$
2016-11-22 18:52:43,741 INFO [Thread-79] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as yyy.yyy.yyy.yyy:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:52:43,742 INFO [Thread-79] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741848_1024
2016-11-22 18:52:43,744 INFO [Thread-79] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[yyy.yyy.yyy.yyy:50010,DS-fc167096-246b-4215-b344-be786d98c472,DISK]
2016-11-22 18:52:46,760 INFO [Thread-79] hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as zzz.zzz.zzz.zzz:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1393)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1295)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:463)
2016-11-22 18:52:46,760 INFO [Thread-79] hdfs.DFSClient: Abandoning BP-90489822-xxx.xxx.xxx.xxx-1479836232259:blk_1073741849_1025
2016-11-22 18:52:46,766 INFO [Thread-79] hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[zzz.zzz.zzz.zzz:50010,DS-c1dc059d-8f0b-4971-88cc-ebc76dd8659a,DISK]
有人能给出一个线索，为什么这两个（只有这两个）服务在几分钟后停止了？