解决HBase一个cell存储超10M的异常

解决Hbase KeyValue size too large或 Cell with size 25000046 exceeds limit of 10485760 bytes at的异常。
​HBase默认一个cell(单元格)只能存10M，有一些需求一个cell存大于10M的数据，比如将BitSet、BitMap对象存在HBase上。BitSet或BitMap存一亿个整数只需要11.9M，如存Integer需要381M，总之就是能节省很多空间。下一篇文章会讲BitSet、BitMap的算法这里就不多讲了，今天主要讲HBase一个cell存储超过10M以上的文件（20M、50M、100M）。HBase数据是存在HDFS上，存一些大文件是没有问题的，性能可能会差一点，但可以满足我们的需求，别的数据库暂时好像不满足这个需求。

先来看一下报错的几种情况：

#情况一 这种情况是什么都没有配置的或程序中没有设置hbase.client.keyvalue.maxsize
java.lang.IllegalArgumentException: KeyValue size too large
 at org.apache.hadoop.hbase.client.HTable.validatePut(HTable.java:952)
 at org.apache.hadoop.hbase.client.HTable.validatePut(HTable.java:940)
 at org.apache.hadoop.hbase.client.HTable.put(HTable.java:545)
 at 
 
 #情况二  这种情况是程序或Hbase只设置了hbase.client.keyvalue.maxsize
 Exception in thread "main"org.apache.hadoop.hbase.DoNotRetryIOException:
 org.apache.hadoop.hbase.DoNotRetryIOException: Cell with size 25000046 exceeds limit of 10485760 bytes  at org.apache.hadoop.hbase.regionserver.RSRpcServices.checkCellSizeLimit(RSRpcServices.java:944)
	at org.apache.hadoop.hbase.regionserver.RSRpcServices.mutate(RSRpcServices.java:2792)
	at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42000)
	at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413)
	at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130)
	at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)
	at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)

1、首先配置HBase的hbase-site.xml文件

<property>
    <name>hbase.client.keyvalue.maxsizename>
    <value>52428800value>
property>
<property>
    <name>hbase.server.keyvalue.maxsizename>
    <value>52428800value>
property>

2、创建Hbase链接的配置

		//java scala 通用
 		val conf = HBaseConfiguration.create()
    conf.set(HConstants.ZOOKEEPER_QUORUM, "CentOS");
    conf.set(HConstants.ZOOKEEPER_CLIENT_PORT,"2181");
    // Hbase每个单元格数据最大50M，如需更大需修改HBase配置
    conf.set("hbase.client.keyvalue.maxsize","52428800");
		// 一般程序中配置client就可以，不行在配置server参数
    //conf.set("hbase.server.keyvalue.maxsize","52428800");
    Connection conn = ConnectionFactory.createConnection(conf);

接下就可以操作了，有什么疑问可以给我留言

官网摘要

• hbase.client.keyvalue.maxsize

  DescriptionSpecifies the combined maximum allowed size of a KeyValue instance. This is to set an upper boundary for a single entry saved in a storage file. Since they cannot be split it helps avoiding that a region cannot be split any further because the data is too large. It seems wise to set this to a fraction of the maximum region size. Setting it to zero or less disables the check.Default10485760

• hbase.server.keyvalue.maxsize

  DescriptionMaximum allowed size of an individual cell, inclusive of value and all key components. A value of 0 or less disables the check. The default value is 10MB. This is a safety setting to protect the server from OOM situations. Default 10485760

  官网地址：https://hbase.apache.org/book.html#important_configurations

HBase的具体使用，可以参考这片文章：https://blog.csdn.net/z1987865446/article/details/109061984