janusgraph连接hbase出错hadoop.hbase.client.RetriesExhaustedException: Can't get the locations
- 问题：
Janusgraph 连接hbase 失败
graph=JanusGraphFactory.open('conf/janusgraph-hbase-es.properties')
- 错误信息：
Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Temporary failure in storage backend
at org.janusgraph.diskstorage.hbase.HBaseStoreManager.ensureTableExists(HBaseStoreManager.java:746)
at org.janusgraph.diskstorage.hbase.HBaseStoreManager.getLocalKeyPartition(HBaseStoreManager.java:535)
at org.janusgraph.diskstorage.hbase.HBaseStoreManager.getDeployment(HBaseStoreManager.java:374)
... 54 more
Caused by: org.apache.hadoop.hbase.client.RetriesExhaustedException: Can't get the locations
at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.getRegionLocations(RpcRetryingCallerWithReadReplicas.java:319)
at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:156)
at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:60)
at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:210)
at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:327)
at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:302)
at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:167)
at org.apache.hadoop.hbase.client.ClientScanner.
at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:797)
at org.apache.hadoop.hbase.MetaTableAccessor.fullScan(MetaTableAccessor.java:602)
at org.apache.hadoop.hbase.MetaTableAccessor.tableExists(MetaTableAccessor.java:366)
at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:406)
at org.janusgraph.diskstorage.hbase.HBaseAdmin1_0.tableExists(HBaseAdmin1_0.java:111)
- 问题原因
将The baseZnode of "/hbase-unsecure " 改为 /hbase
具体：在ambari管理的HBASE config --- Advanced hbase-site --- ZooKeeper Znode Parent
这一项的值改为/hbase。（原始值为/hbase-unsecure）
- 解决后启动
- 排查过程
- hbase默认端口修改
将hbase的端口修改为默认的60000、60010、60020、60030后。依然报上述错误信息。
结论：与端口无关
- HBase Regionserver节点部署Zookeeper服务
在master.hadoop.com,node1.hadoop.com,node2.hadoop.com中分别查看是否启动Zookeepr服务。重新启动服务，依然报上述错误。
结论：与zookeeper节点无关（当然zookeeper服务必须启动）
- 时间同步（网上说可能和时间同步）
系统时间和本地时间同步后，依然报上述错误。
结论：与时间同步无关。
- 连接前提
janusgraph的hbase配置文件中storage.hostname进行确认，此处的值需和hbase.zookeeper.quorum（在hbase的Advanced hbase-site中找）的值一致。