Re: Can I use the java client of newer version to connect to a old version server?
I think I got the reason. At first, I noticed that the row number from the exception stack is not compatible to the client 1.2.2 source, then it exactly occurred at the old version 1.0.3 server side. Then the service side exception told us that it failed from reading the last string array: https://github.com/elasticsearch/elasticsearch/blob/1.0/src/main/java/org/elasticsearch/action/admin/cluster/state/ClusterStateRequest.java#L132 I recognized that the real problem is the client size did not check the version correctly, then I digged the source more deeply, then I found the following row which seems wrong: https://github.com/elasticsearch/elasticsearch/blob/1.0/src/main/java/org/elasticsearch/client/transport/TransportClientNodesService.java#L164 DiscoveryNode node = new DiscoveryNode(#transport#- + tempNodeIdGenerator .incrementAndGet(), transportAddress, version); *The nodes passed to construct the transport client are simply initialized as the current client version.* I have no idea how to fix it but it seems that it should be reported as a bug? 在 2014年7月12日星期六UTC+9上午4时29分01秒,Ivan Brusic写道: The code is suspicious since it has an explicit check for versions prior to 1.2 https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/action/admin/cluster/state/ClusterStateRequest.java#L121-L124 Don't know much else about the code to comment further. Cheers, Ivan On Fri, Jul 11, 2014 at 3:30 AM, xzer LR xia...@gmail.com javascript: wrote: I am using TransportClient, the following is how I retrieve the client instance: Client client = new TransportClient(sb.build()).addTransportAddresses(esAddresses); 在 2014年7月11日星期五UTC+9下午6时51分26秒,David Pilato写道: Are you using a TransportClient or NodeClient? If NodeClient, could you try with the TransportClient? -- *David Pilato* | *Technical Advocate* | *Elasticsearch.com* @dadoonet https://twitter.com/dadoonet | @elasticsearchfr https://twitter.com/elasticsearchfr Le 11 juillet 2014 à 11:14:59, xzer LR (xia...@gmail.com) a écrit: As a test result, I got exceptions when I tried to use the newest 1.2.2 java client to connect to a 1.0.3 cluster: 18:05:41.020 [elasticsearch[Slipstream][transport_client_worker][T#1]{New I/O worker #1}] [INFO ] [] org.elasticsearch.client.transport[105] - [Slipstream] failed to get local cluster state for [#transport#-1][e-note][inet[/192.168.200.81:9300]], disconnecting... org.elasticsearch.transport.RemoteTransportException: [server-cat][inet[/192.168.21.81:9300]][cluster/state] java.lang.IndexOutOfBoundsException: Readable byte limit exceeded: 48 at org.elasticsearch.common.netty.buffer.AbstractChannelBuffer.readByte( AbstractChannelBuffer.java:236) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.ChannelBufferStreamInput.readByte( ChannelBufferStreamInput.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readVInt(StreamInput.java:141) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readString(StreamInput.java:272) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.HandlesStreamInput. readString(HandlesStreamInput.java:61) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput. readStringArray(StreamInput.java:362) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.action.admin.cluster.state. ClusterStateRequest.readFrom(ClusterStateRequest.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler. handleRequest(MessageChannelHandler.java:209) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler. messageReceived(MessageChannelHandler.java:109) ~[elasticsearch-1.2.2.jar:na] I didn't find any metioned break change about this exceptioin. 在 2014年7月4日星期五UTC+9下午3时31分07秒,David Pilato写道: Well. It depends. 1.0 is incompatible with 0.90 1.2 should work with 1.x IIRC. From 1.0, we try to keep this compatible. If not, release notes will tell you. -- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 4 juil. 2014 à 07:09, xzer LR xia...@gmail.com a écrit : For some reasons, we have several separated elasticsearch clusters for our front applicaitons. We want to upgrade our clusters' version to the newest version but apparently it is impossible to upgrade all the clusters at the same time, which means our single application have to connect to multiple clusters with different versions. My question is whether the elasticsearch java client has the ability to work correctly with an old version server? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearc...@googlegroups.com. To view this discussion on the
Re: Can I use the java client of newer version to connect to a old version server?
You can not connect a newer TransportClient to a server which is older. You can connect an older TransportClient to a newer server (without being able to use new features). Jörg On Mon, Jul 14, 2014 at 10:36 AM, xzer LR xiao...@gmail.com wrote: I think I got the reason. At first, I noticed that the row number from the exception stack is not compatible to the client 1.2.2 source, then it exactly occurred at the old version 1.0.3 server side. Then the service side exception told us that it failed from reading the last string array: https://github.com/elasticsearch/elasticsearch/blob/1.0/src/main/java/org/elasticsearch/action/admin/cluster/state/ClusterStateRequest.java#L132 I recognized that the real problem is the client size did not check the version correctly, then I digged the source more deeply, then I found the following row which seems wrong: https://github.com/elasticsearch/elasticsearch/blob/1.0/src/main/java/org/elasticsearch/client/transport/TransportClientNodesService.java#L164 DiscoveryNode node = new DiscoveryNode(#transport#- + tempNodeIdGenerator.incrementAndGet(), transportAddress, version); *The nodes passed to construct the transport client are simply initialized as the current client version.* I have no idea how to fix it but it seems that it should be reported as a bug? 在 2014年7月12日星期六UTC+9上午4时29分01秒,Ivan Brusic写道: The code is suspicious since it has an explicit check for versions prior to 1.2 https://github.com/elasticsearch/elasticsearch/ blob/master/src/main/java/org/elasticsearch/action/admin/cluster/state/ ClusterStateRequest.java#L121-L124 Don't know much else about the code to comment further. Cheers, Ivan On Fri, Jul 11, 2014 at 3:30 AM, xzer LR xia...@gmail.com wrote: I am using TransportClient, the following is how I retrieve the client instance: Client client = new TransportClient(sb.build()).addTransportAddresses( esAddresses); 在 2014年7月11日星期五UTC+9下午6时51分26秒,David Pilato写道: Are you using a TransportClient or NodeClient? If NodeClient, could you try with the TransportClient? -- *David Pilato* | *Technical Advocate* | *Elasticsearch.com* @dadoonet https://twitter.com/dadoonet | @elasticsearchfr https://twitter.com/elasticsearchfr Le 11 juillet 2014 à 11:14:59, xzer LR (xia...@gmail.com) a écrit: As a test result, I got exceptions when I tried to use the newest 1.2.2 java client to connect to a 1.0.3 cluster: 18:05:41.020 [elasticsearch[Slipstream][transport_client_worker][T#1]{New I/O worker #1}] [INFO ] [] org.elasticsearch.client.transport[105] - [Slipstream] failed to get local cluster state for [#transport#-1][e-note][inet[/192.168.200.81:9300]], disconnecting... org.elasticsearch.transport.RemoteTransportException: [server-cat][inet[/192.168.21.81:9300]][cluster/state] java.lang.IndexOutOfBoundsException: Readable byte limit exceeded: 48 at org.elasticsearch.common.netty.buffer.AbstractChannelBuffer. readByte(AbstractChannelBuffer.java:236) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.ChannelBufferStreamInput.readByte( ChannelBufferStreamInput.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readVInt(StreamInput.java:141) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readString(StreamInput.java:272) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.HandlesStreamInput.readSt ring(HandlesStreamInput.java:61) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readStringArr ay(StreamInput.java:362) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.action.admin.cluster.state.ClusterStateReq uest.readFrom(ClusterStateRequest.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.hand leRequest(MessageChannelHandler.java:209) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.mess ageReceived(MessageChannelHandler.java:109) ~[elasticsearch-1.2.2.jar:na] I didn't find any metioned break change about this exceptioin. 在 2014年7月4日星期五UTC+9下午3时31分07秒,David Pilato写道: Well. It depends. 1.0 is incompatible with 0.90 1.2 should work with 1.x IIRC. From 1.0, we try to keep this compatible. If not, release notes will tell you. -- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 4 juil. 2014 à 07:09, xzer LR xia...@gmail.com a écrit : For some reasons, we have several separated elasticsearch clusters for our front applicaitons. We want to upgrade our clusters' version to the newest version but apparently it is impossible to upgrade all the clusters at the same time, which means our single application have to connect to multiple clusters with different versions. My question is whether the elasticsearch java client has the ability to work correctly with an old version server? -- You received this message
Re: Can I use the java client of newer version to connect to a old version server?
Thank you for the comment, according to the source, it seems you are right. I will try a converse test 在 2014年7月14日星期一UTC+9下午6时36分03秒,Jörg Prante写道: You can not connect a newer TransportClient to a server which is older. You can connect an older TransportClient to a newer server (without being able to use new features). Jörg On Mon, Jul 14, 2014 at 10:36 AM, xzer LR xia...@gmail.com javascript: wrote: I think I got the reason. At first, I noticed that the row number from the exception stack is not compatible to the client 1.2.2 source, then it exactly occurred at the old version 1.0.3 server side. Then the service side exception told us that it failed from reading the last string array: https://github.com/elasticsearch/elasticsearch/blob/1.0/src/main/java/org/elasticsearch/action/admin/cluster/state/ClusterStateRequest.java#L132 I recognized that the real problem is the client size did not check the version correctly, then I digged the source more deeply, then I found the following row which seems wrong: https://github.com/elasticsearch/elasticsearch/blob/1.0/src/main/java/org/elasticsearch/client/transport/TransportClientNodesService.java#L164 DiscoveryNode node = new DiscoveryNode(#transport#- + tempNodeIdGenerator.incrementAndGet(), transportAddress, version); *The nodes passed to construct the transport client are simply initialized as the current client version.* I have no idea how to fix it but it seems that it should be reported as a bug? 在 2014年7月12日星期六UTC+9上午4时29分01秒,Ivan Brusic写道: The code is suspicious since it has an explicit check for versions prior to 1.2 https://github.com/elasticsearch/elasticsearch/ blob/master/src/main/java/org/elasticsearch/action/admin/cluster/state/ ClusterStateRequest.java#L121-L124 Don't know much else about the code to comment further. Cheers, Ivan On Fri, Jul 11, 2014 at 3:30 AM, xzer LR xia...@gmail.com wrote: I am using TransportClient, the following is how I retrieve the client instance: Client client = new TransportClient(sb.build()).addTransportAddresses( esAddresses); 在 2014年7月11日星期五UTC+9下午6时51分26秒,David Pilato写道: Are you using a TransportClient or NodeClient? If NodeClient, could you try with the TransportClient? -- *David Pilato* | *Technical Advocate* | *Elasticsearch.com* @dadoonet https://twitter.com/dadoonet | @elasticsearchfr https://twitter.com/elasticsearchfr Le 11 juillet 2014 à 11:14:59, xzer LR (xia...@gmail.com) a écrit: As a test result, I got exceptions when I tried to use the newest 1.2.2 java client to connect to a 1.0.3 cluster: 18:05:41.020 [elasticsearch[Slipstream][tra nsport_client_worker][T#1]{New I/O worker #1}] [INFO ] [] org.elasticsearch.client.transport[105] - [Slipstream] failed to get local cluster state for [#transport#-1][e-note][inet[/192.168.200.81:9300]], disconnecting... org.elasticsearch.transport.RemoteTransportException: [server-cat][inet[/192.168.21.81:9300]][cluster/state] java.lang.IndexOutOfBoundsException: Readable byte limit exceeded: 48 at org.elasticsearch.common.netty.buffer.AbstractChannelBuffer. readByte(AbstractChannelBuffer.java:236) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.ChannelBufferStreamInput.r eadByte(ChannelBufferStreamInput.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readVInt(StreamInput.java:141) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readString(StreamInput.java:272) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.HandlesStreamInput.readSt ring(HandlesStreamInput.java:61) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readStringArr ay(StreamInput.java:362) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.action.admin.cluster.state.ClusterStateReq uest.readFrom(ClusterStateRequest.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.hand leRequest(MessageChannelHandler.java:209) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.mess ageReceived(MessageChannelHandler.java:109) ~[elasticsearch-1.2.2.jar:na] I didn't find any metioned break change about this exceptioin. 在 2014年7月4日星期五UTC+9下午3时31分07秒,David Pilato写道: Well. It depends. 1.0 is incompatible with 0.90 1.2 should work with 1.x IIRC. From 1.0, we try to keep this compatible. If not, release notes will tell you. -- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 4 juil. 2014 à 07:09, xzer LR xia...@gmail.com a écrit : For some reasons, we have several separated elasticsearch clusters for our front applicaitons. We want to upgrade our clusters' version to the newest version but apparently it is impossible to upgrade all the clusters at the same time, which means our single
Re: Can I use the java client of newer version to connect to a old version server?
Are you using a TransportClient or NodeClient? If NodeClient, could you try with the TransportClient? -- David Pilato | Technical Advocate | Elasticsearch.com @dadoonet | @elasticsearchfr Le 11 juillet 2014 à 11:14:59, xzer LR (xiao...@gmail.com) a écrit: As a test result, I got exceptions when I tried to use the newest 1.2.2 java client to connect to a 1.0.3 cluster: 18:05:41.020 [elasticsearch[Slipstream][transport_client_worker][T#1]{New I/O worker #1}] [INFO ] [] org.elasticsearch.client.transport[105] - [Slipstream] failed to get local cluster state for [#transport#-1][e-note][inet[/192.168.200.81:9300]], disconnecting... org.elasticsearch.transport.RemoteTransportException: [server-cat][inet[/192.168.21.81:9300]][cluster/state] java.lang.IndexOutOfBoundsException: Readable byte limit exceeded: 48 at org.elasticsearch.common.netty.buffer.AbstractChannelBuffer.readByte(AbstractChannelBuffer.java:236) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.ChannelBufferStreamInput.readByte(ChannelBufferStreamInput.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readVInt(StreamInput.java:141) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readString(StreamInput.java:272) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.HandlesStreamInput.readString(HandlesStreamInput.java:61) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readStringArray(StreamInput.java:362) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.action.admin.cluster.state.ClusterStateRequest.readFrom(ClusterStateRequest.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.handleRequest(MessageChannelHandler.java:209) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.messageReceived(MessageChannelHandler.java:109) ~[elasticsearch-1.2.2.jar:na] I didn't find any metioned break change about this exceptioin. 在 2014年7月4日星期五UTC+9下午3时31分07秒,David Pilato写道: Well. It depends. 1.0 is incompatible with 0.90 1.2 should work with 1.x IIRC. From 1.0, we try to keep this compatible. If not, release notes will tell you. -- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 4 juil. 2014 à 07:09, xzer LR xia...@gmail.com a écrit : For some reasons, we have several separated elasticsearch clusters for our front applicaitons. We want to upgrade our clusters' version to the newest version but apparently it is impossible to upgrade all the clusters at the same time, which means our single application have to connect to multiple clusters with different versions. My question is whether the elasticsearch java client has the ability to work correctly with an old version server? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearc...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/baa98ec5-ffcf-46f9-bfdd-7afbd213b19d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/77e32825-812a-46c8-82b4-93a5e4b12788%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/etPan.53bfb38f.1190cde7.70e%40MacBook-Air-de-David.local. For more options, visit https://groups.google.com/d/optout.
Re: Can I use the java client of newer version to connect to a old version server?
The code is suspicious since it has an explicit check for versions prior to 1.2 https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/action/admin/cluster/state/ClusterStateRequest.java#L121-L124 Don't know much else about the code to comment further. Cheers, Ivan On Fri, Jul 11, 2014 at 3:30 AM, xzer LR xiao...@gmail.com wrote: I am using TransportClient, the following is how I retrieve the client instance: Client client = new TransportClient(sb.build()).addTransportAddresses(esAddresses); 在 2014年7月11日星期五UTC+9下午6时51分26秒,David Pilato写道: Are you using a TransportClient or NodeClient? If NodeClient, could you try with the TransportClient? -- *David Pilato* | *Technical Advocate* | *Elasticsearch.com* @dadoonet https://twitter.com/dadoonet | @elasticsearchfr https://twitter.com/elasticsearchfr Le 11 juillet 2014 à 11:14:59, xzer LR (xia...@gmail.com) a écrit: As a test result, I got exceptions when I tried to use the newest 1.2.2 java client to connect to a 1.0.3 cluster: 18:05:41.020 [elasticsearch[Slipstream][transport_client_worker][T#1]{New I/O worker #1}] [INFO ] [] org.elasticsearch.client.transport[105] - [Slipstream] failed to get local cluster state for [#transport#-1][e-note][inet[/192.168.200.81:9300]], disconnecting... org.elasticsearch.transport.RemoteTransportException: [server-cat][inet[/ 192.168.21.81:9300]][cluster/state] java.lang.IndexOutOfBoundsException: Readable byte limit exceeded: 48 at org.elasticsearch.common.netty.buffer.AbstractChannelBuffer.readByte( AbstractChannelBuffer.java:236) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.ChannelBufferStreamInput.readByte( ChannelBufferStreamInput.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readVInt(StreamInput.java:141) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput.readString(StreamInput.java:272) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.HandlesStreamInput. readString(HandlesStreamInput.java:61) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.common.io.stream.StreamInput. readStringArray(StreamInput.java:362) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.action.admin.cluster.state. ClusterStateRequest.readFrom(ClusterStateRequest.java:132) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler.handleRequest( MessageChannelHandler.java:209) ~[elasticsearch-1.2.2.jar:na] at org.elasticsearch.transport.netty.MessageChannelHandler. messageReceived(MessageChannelHandler.java:109) ~[elasticsearch-1.2.2.jar:na] I didn't find any metioned break change about this exceptioin. 在 2014年7月4日星期五UTC+9下午3时31分07秒,David Pilato写道: Well. It depends. 1.0 is incompatible with 0.90 1.2 should work with 1.x IIRC. From 1.0, we try to keep this compatible. If not, release notes will tell you. -- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 4 juil. 2014 à 07:09, xzer LR xia...@gmail.com a écrit : For some reasons, we have several separated elasticsearch clusters for our front applicaitons. We want to upgrade our clusters' version to the newest version but apparently it is impossible to upgrade all the clusters at the same time, which means our single application have to connect to multiple clusters with different versions. My question is whether the elasticsearch java client has the ability to work correctly with an old version server? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearc...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/ msgid/elasticsearch/baa98ec5-ffcf-46f9-bfdd-7afbd213b19d% 40googlegroups.com https://groups.google.com/d/msgid/elasticsearch/baa98ec5-ffcf-46f9-bfdd-7afbd213b19d%40googlegroups.com?utm_medium=emailutm_source=footer . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearc...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/ msgid/elasticsearch/77e32825-812a-46c8-82b4-93a5e4b12788% 40googlegroups.com https://groups.google.com/d/msgid/elasticsearch/77e32825-812a-46c8-82b4-93a5e4b12788%40googlegroups.com?utm_medium=emailutm_source=footer . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit
Re: Can I use the java client of newer version to connect to a old version server?
Well. It depends. 1.0 is incompatible with 0.90 1.2 should work with 1.x IIRC. From 1.0, we try to keep this compatible. If not, release notes will tell you. -- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 4 juil. 2014 à 07:09, xzer LR xiao...@gmail.com a écrit : For some reasons, we have several separated elasticsearch clusters for our front applicaitons. We want to upgrade our clusters' version to the newest version but apparently it is impossible to upgrade all the clusters at the same time, which means our single application have to connect to multiple clusters with different versions. My question is whether the elasticsearch java client has the ability to work correctly with an old version server? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/baa98ec5-ffcf-46f9-bfdd-7afbd213b19d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/97C66A72-7C01-4059-9DCE-F6B568FEB7E1%40pilato.fr. For more options, visit https://groups.google.com/d/optout.