Re: Site Not Surviving a Single Cassandra Node Crash
Not sure about that Hector Version, but there was a Hector Bug that Hector did Not stop using a Dead Node As Proxy and that it did not do proper Load balancing in the requests. If you enable trace Logs for Hector you can See which nodes it uses for requests. If there is a newer 0.6 Hector you should give it a try. Furthermore i Suggest Brunhild down One Node and request data with the cli. If that Works it is probably the Hector bug. Am 10.04.2011 um 06:57 schrieb Patricio Echagüe patric...@gmail.commailto:patric...@gmail.com: What is the consistency level you are using ? And as Ed said, if you can provide the stacktrace that would help too. On Sat, Apr 9, 2011 at 7:02 PM, aaron morton mailto:aa...@thelastpickle.comaa...@thelastpickle.commailto:aa...@thelastpickle.com wrote: btw, the nodes are a tad out of balance was that deliberate ? http://wiki.apache.org/cassandra/Operations#Token_selectionhttp://wiki.apache.org/cassandra/Operations#Token_selection http://wiki.apache.org/cassandra/Operations#Load_balancinghttp://wiki.apache.org/cassandra/Operations#Load_balancing Aaron On 10 Apr 2011, at 08:44, Ed Anuff wrote: Sounds like the problem might be on the hector side. Lots of hector users on this list, but usually not a bad idea to ask on mailto:hector-us...@googlegroups.comhector-us...@googlegroups.commailto:hector-us...@googlegroups.com (cc'd). The jetty servers stopping responding is a bit vague, somewhere in your logs is an error message that should shed some light on where things are going awry. If you can find the exception that's being thrown in hector and post that, it'd make it much easier to help you out. Ed On Sat, Apr 9, 2011 at 12:11 PM, Vram Kouramajian mailto:vram.kouramaj...@gmail.comvram.kouramaj...@gmail.commailto:vram.kouramaj...@gmail.com wrote: The hector clients are used as part of our jetty servers. And, the jetty servers stop responding when one of the Cassandra nodes go down. Vram On Sat, Apr 9, 2011 at 11:54 AM, Joe Stump mailto:j...@joestump.netj...@joestump.netmailto:j...@joestump.net wrote: Did the Cassandra cluster go down or did you start getting failures from the client when it routed queries to the downed node? The key in the client is to keep working around the ring if the initial node is down. --Joe On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote: We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: OwnsRange Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674| ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528|--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
Site Not Surviving a Single Cassandra Node Crash
We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: OwnsRange Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674| ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528|--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
Re: Site Not Surviving a Single Cassandra Node Crash
Did the Cassandra cluster go down or did you start getting failures from the client when it routed queries to the downed node? The key in the client is to keep working around the ring if the initial node is down. --Joe On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote: We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: OwnsRange Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674| ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528|--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
Re: Site Not Surviving a Single Cassandra Node Crash
The hector clients are used as part of our jetty servers. And, the jetty servers stop responding when one of the Cassandra nodes go down. Vram On Sat, Apr 9, 2011 at 11:54 AM, Joe Stump j...@joestump.net wrote: Did the Cassandra cluster go down or did you start getting failures from the client when it routed queries to the downed node? The key in the client is to keep working around the ring if the initial node is down. --Joe On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote: We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: Owns Range Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203 v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674 | ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528 |--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
Re: Site Not Surviving a Single Cassandra Node Crash
Sounds like the problem might be on the hector side. Lots of hector users on this list, but usually not a bad idea to ask on hector-us...@googlegroups.com (cc'd). The jetty servers stopping responding is a bit vague, somewhere in your logs is an error message that should shed some light on where things are going awry. If you can find the exception that's being thrown in hector and post that, it'd make it much easier to help you out. Ed On Sat, Apr 9, 2011 at 12:11 PM, Vram Kouramajian vram.kouramaj...@gmail.com wrote: The hector clients are used as part of our jetty servers. And, the jetty servers stop responding when one of the Cassandra nodes go down. Vram On Sat, Apr 9, 2011 at 11:54 AM, Joe Stump j...@joestump.net wrote: Did the Cassandra cluster go down or did you start getting failures from the client when it routed queries to the downed node? The key in the client is to keep working around the ring if the initial node is down. --Joe On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote: We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: Owns Range Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203 v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674 | ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528 |--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
Re: Site Not Surviving a Single Cassandra Node Crash
btw, the nodes are a tad out of balance was that deliberate ? http://wiki.apache.org/cassandra/Operations#Token_selection http://wiki.apache.org/cassandra/Operations#Load_balancing Aaron On 10 Apr 2011, at 08:44, Ed Anuff wrote: Sounds like the problem might be on the hector side. Lots of hector users on this list, but usually not a bad idea to ask on hector-us...@googlegroups.com (cc'd). The jetty servers stopping responding is a bit vague, somewhere in your logs is an error message that should shed some light on where things are going awry. If you can find the exception that's being thrown in hector and post that, it'd make it much easier to help you out. Ed On Sat, Apr 9, 2011 at 12:11 PM, Vram Kouramajian vram.kouramaj...@gmail.com wrote: The hector clients are used as part of our jetty servers. And, the jetty servers stop responding when one of the Cassandra nodes go down. Vram On Sat, Apr 9, 2011 at 11:54 AM, Joe Stump j...@joestump.net wrote: Did the Cassandra cluster go down or did you start getting failures from the client when it routed queries to the downed node? The key in the client is to keep working around the ring if the initial node is down. --Joe On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote: We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: OwnsRange Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674| ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528|--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
Re: Site Not Surviving a Single Cassandra Node Crash
What is the consistency level you are using ? And as Ed said, if you can provide the stacktrace that would help too. On Sat, Apr 9, 2011 at 7:02 PM, aaron morton aa...@thelastpickle.comwrote: btw, the nodes are a tad out of balance was that deliberate ? http://wiki.apache.org/cassandra/Operations#Token_selection http://wiki.apache.org/cassandra/Operations#Load_balancing Aaron On 10 Apr 2011, at 08:44, Ed Anuff wrote: Sounds like the problem might be on the hector side. Lots of hector users on this list, but usually not a bad idea to ask on hector-us...@googlegroups.com (cc'd). The jetty servers stopping responding is a bit vague, somewhere in your logs is an error message that should shed some light on where things are going awry. If you can find the exception that's being thrown in hector and post that, it'd make it much easier to help you out. Ed On Sat, Apr 9, 2011 at 12:11 PM, Vram Kouramajian vram.kouramaj...@gmail.com wrote: The hector clients are used as part of our jetty servers. And, the jetty servers stop responding when one of the Cassandra nodes go down. Vram On Sat, Apr 9, 2011 at 11:54 AM, Joe Stump j...@joestump.net wrote: Did the Cassandra cluster go down or did you start getting failures from the client when it routed queries to the downed node? The key in the client is to keep working around the ring if the initial node is down. --Joe On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote: We have a 5 Cassandra nodes with the following configuration: Casandra Version: 0.6.11 Number of Nodes: 5 Replication Factor: 3 Client: Hector 0.6.0-14 Write Consistency Level: Quorum Read Consistency Level: Quorum Ring Topology: OwnsRange Ring 132756707369141912386052673276321963528 192.168.89.153Up 4.15 GB 33.87% 20237398133070283622632741498697119875 |--| 192.168.89.155Up 5.17 GB 18.29% 51358066040236348437506517944084891398 | ^ 192.168.89.154Up 7.41 GB 33.97% 109158969152851862753910401160326064203v | 192.168.89.152Up 5.07 GB 6.34% 119944993359936402983569623214763193674| ^ 192.168.89.151Up 4.22 GB 7.53% 132756707369141912386052673276321963528|--| We believe that our setup should survive the crash of one of the Cassandra nodes. But, we had few crashes and the system stopped functioning until we brought back the Cassandra nodes. Any clues? Vram
