The dfs.encrypt.data.transfer is false, and I have update the datanode to 2.7.6,the error info changed a little, it don’t have encryption. 2018-06-28 00:44:47,557 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Failed to read expe cted SASL data transfer protection handshake from client at /127.0.0.1:51513. Perhaps the client is running an older version of Hadoop which does not support SASL data transfer protection I use a libhdfs3 client to connect Hadoop, the function Hdfs::OutputStream::sync() fail, got the error log TcpSocket.cpp: 79: HdfsEndOfStream: Read 8 bytes failed from ""127.0.0.1:61004"": End of the stream. It seem can’t receive handshake info from datanode, still confused by it.
> On 27 Jun 2018, at 10:33 PM, Brahma Reddy Battula > <brahmareddy.batt...@huawei.com <mailto:brahmareddy.batt...@huawei.com>> > wrote: > > Unknowingly “dfs.encrypt.data.transfer” configured as true in datanode?? > Please cross with check datanode configurations using the following way. > http://<DN_IP>:<httpport>/conf <http://%3cDN_IP%3e:%3chttpport%3e/conf> > > bq.1 what the client mean, it mean the application running on hdfs, how does > it have a encryption? > Yes, application (client) which is connected to DN while handshake > > From: ZongtianHou [mailto:zongtian...@icloud.com > <mailto:zongtian...@icloud.com>] > Sent: 27 June 2018 14:54 > To: user@hadoop.apache.org <mailto:user@hadoop.apache.org> > Subject: Re: Security problem extra > > Does anyone have some clue about it? I have updated the jdk, and still cannot > solve the problem. Thx advance for any info!! > On 27 Jun 2018, at 12:23 AM, ZongtianHou <zongtian...@icloud.com > <mailto:zongtian...@icloud.com>> wrote: > > This is the log info: org.apache.hadoop.hdfs.server.datanode.DataNode: Failed > to read expected encryption handshake from client at /127.0.0.1:53611. > Perhaps the client is running an older version of Hadoop which does not > support encryption > > I have two more questions here. > 1 what the client mean, it mean the application running on hdfs, how does it > have a encryption? > 2 I have turn off the encryption about data transfer, rpc protection, http > protection by setting properties of hadoop.rpc.protection, > dfs.encrypt.data.transfer and dfs.http.policy as false, why there is still > encryption? > > Any clue will be appreciated.
