"hadoop上课笔记:java编程和HBase的API和类介绍"

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本文主要介绍了Hadoop课程中关于Java编程和Hbase的笔记。首先介绍了Hbase和Java编程的一些基本概念和类,包括Admin类、HBaseConfiguration类、HBaseDescriptor接口、HColumnDescriptor类、Table接口、Put类、Get类、Delete类、Scan类和Result类等。其次,介绍了Hbase的API的使用方法,包括打开官网、查看API、了解HBaseConfiguration类、观察create()方法和继承的方法等。在学习Java编程和Hbase的过程中,对于这些基本类和API的掌握将有助于更深入的学习和应用。

23/07/23 16:19:48 ERROR AsyncProcess: Failed to get region location org.apache.hadoop.hbase.DoNotRetryIOException: java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.hbase.util.ByteStringer at org.apache.hadoop.hbase.client.RpcRetryingCaller.translateException(RpcRetryingCaller.java:241) at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:214) at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:364) at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:338) at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:137) at org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFuture.run(ResultBoundedCompletionService.java:65) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.hbase.util.ByteStringer at org.apache.hadoop.hbase.protobuf.RequestConverter.buildRegionSpecifier(RequestConverter.java:1041) at org.apache.hadoop.hbase.protobuf.RequestConverter.buildScanRequest(RequestConverter.java:492) at org.apache.hadoop.hbase.client.ClientSmallReversedScanner$SmallReversedScannerCallable.call(ClientSmallReversedScanner.java:291) at org.apache.hadoop.hbase.client.ClientSmallReversedScanner$SmallReversedScannerCallable.call(ClientSmallReversedScanner.java:276) at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:212) ... 7 more

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org.apache.hadoop.hbase.DoNotRetryIOException: Unable to load configured region split policy 'org.apache.phoenix.schema.MetaDataSplitPolicy' for table 'SYSTEM.CATALOG' Set hbase.table.sanity.checks to false at conf or table descriptor if you want to bypass sanity checks at org.apache.hadoop.hbase.util.TableDescriptorChecker.warnOrThrowExceptionForFailure(TableDescriptorChecker.java:296) at org.apache.hadoop.hbase.util.TableDescriptorChecker.sanityCheck(TableDescriptorChecker.java:109) at org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:2025) at org.apache.hadoop.hbase.master.MasterRpcServices.createTable(MasterRpcServices.java:657) at org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318) org.apache.hadoop.hbase.DoNotRetryIOException: Unable to load configured region split policy 'org.apache.phoenix.schema.MetaDataSplitPolicy' for table 'SYSTEM.CATALOG' Set hbase.table.sanity.checks to false at conf or table descriptor if you want to bypass sanity checks at org.apache.hadoop.hbase.util.TableDescriptorChecker.warnOrThrowExceptionForFailure(TableDescriptorChecker.java:296) at org.apache.hadoop.hbase.util.TableDescriptorChecker.sanityCheck(TableDescriptorChecker.java:109) at org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:2025) at org.apache.hadoop.hbase.master.MasterRpcServices.createTable(MasterRpcServices.java:657) at org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318)

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