No, by reset I meant purging the ZK database (rm -fr ..../zkdatadir). I've seen a number of cases like this now, where a user plays with hbase for a while and wants to reset back to a state with no data in hbase. They shutdown some of the hbase/zk processes but not all of them (and as a result old zk sessions are hanging around). Really we should invalidate the session: https://issues.apache.org/jira/browse/ZOOKEEPER-583
Patrick On Fri, Aug 27, 2010 at 12:00 PM, Ted Dunning <ted.dunn...@gmail.com> wrote: > Patrick, > > Can you clarify what reset means? It doesn't mean just restart, does it? > > On Thu, Aug 26, 2010 at 5:05 PM, Patrick Hunt <ph...@apache.org> wrote: > > > > Client has seen zxid 0xfa4 our last zxid is 0x42 > > > > Someone reset the zk server database without restarting the clients. As a > > result the client is "forward" in time relative to the cluster. > > > > Patrick > > > > > > On 08/26/2010 04:03 PM, Ted Yu wrote: > > > >> Hi, > >> zookeeper-3.2.2 is used out of HBase 0.20.5 > >> > >> Linux sjc1-.com 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64 > >> x86_64 x86_64 GNU/Linux > >> > >> In hbase-hadoop-zookeeper-sjc1-cml-grid00.log, I see a lot of the > >> following: > >> > >> 2010-08-26 22:58:01,930 INFO org.apache.zookeeper.server.NIOServerCnxn: > >> closing session:0x0 NIOServerCnxn: > >> java.nio.channels.SocketChannel[connected > >> local=/10.201.9.40:2181 remote=/10.201.9.22:63316] > >> 2010-08-26 22:58:02,097 INFO org.apache.zookeeper.server.NIOServerCnxn: > >> Connected to /10.201.9.22:63317 lastZxid 4004 > >> 2010-08-26 22:58:02,097 WARN org.apache.zookeeper.server.NIOServerCnxn: > >> Client has seen zxid 0xfa4 our last zxid is 0x42 > >> 2010-08-26 22:58:02,097 WARN org.apache.zookeeper.server.NIOServerCnxn: > >> Exception causing close of session 0x0 due to java.io.IOException: > Client > >> has seen zxid 0xfa4 our last zxid is 0x42 > >> > >> If you can shed some thought on root cause, that would be great. > >> > >> >
