happybase(TSocket read 0 bytes)
关于报错
happybase 是使用python连接hbase的一个第三方库,目前基于thrift1 。在使用过程中经常碰到报错
TTransportException(type=4, message='TSocket read 0 bytes')
即使使用thrift server首页上提供了连接Apache HBase Wiki on Thrift里的demo也一样报错。
测试代码
import happybase
def get_tables_name(host,port):
conn = happybase.Connection(host=host,port=port)
return conn.tables()
很简单,就是连接hbase,返回所有table名称。
报错可能原因
hbase 未开启thrift服务
Connection参数与thrift服务不匹配
Connection参数
看一下官网wiki上建立连接的例子
from thrift.transport.TSocket import TSocket
from thrift.transport.TTransport import TBufferedTransport
from thrift.protocol import TBinaryProtocol
from hbase import Hbase
transport = TBufferedTransport(TSocket(host, port))
transport.open()
protocol = TBinaryProtocol.TBinaryProtocol(transport)
client = Hbase.Client(protocol)
构建一个连接需要两个辅助类 TBufferedTransport,TBinaryProtocol。其中transport负责通讯协议,protocol负责序列化协议。
happybase connection
happybase官网上对于connection的介绍connection的介绍
总结有三个参数需要匹配
protocol: binary (the default) and compact
compat :0.90, 0.92, 0.94, or 0.96 (the default)
transport :buffered (the default) and framed
在我将上述测试代码改为
import happybase
def get_tables_name(host,port):
conn = happybase.Connection(host=host,port=port,protocol='compact',transport='framed')
return conn.tables()
就没问题了。
转自:https://blog.csdn.net/zhnxin_163/article/details/82879417
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