来自Elasticsearch的打开文件警告过多

Question

持续获取以下警告消息。不知道该怎么办。看到一些相关的帖子要求增加文件描述符的数量。

怎么做呢？

即使现在增加，在添加新索引时也会遇到同样的问题。（目前使用约400个索引，6个分片和1个副本）。指数的数量往往会增加。

[03:58:24,165][WARN ][cluster.action.shard     ] [node1] received shard failed for [index9][2], node[node_hash3], [P], s[INITIALIZING], reason [Failed to start shard, message [IndexShardGatewayRecoveryException[[index9][2] failed recovery]; nested: EngineCreationFailureException[[index9][2] failed to open reader on writer]; nested: FileNotFoundException[/data/elasticsearch/whatever/nodes/0/indices/index9/2/index/segments_1 (Too many open files)]; ]] 
[03:58:24,166][WARN ][cluster.action.shard     ] [node1] received shard failed for [index15][0], node[node_hash2], [P], s[INITIALIZING], reason [Failed to create shard, message [IndexShardCreationException[[index15][0] failed to create shard]; nested: IOException[directory '/data/elasticsearch/whatever/nodes/0/indices/index15/0/index' exists and is a directory, but cannot be listed: list() returned null]; ]] 
[03:58:24,195][WARN ][cluster.action.shard     ] [node1] received shard failed for [index16][3], node[node_hash3], [P], s[INITIALIZING], reason [Failed to start shard, message [IndexShardGatewayRecoveryException[[index16][3] failed recovery]; nested: EngineCreationFailureException[[index16][3] failed to open reader on writer]; nested: FileNotFoundException[/data/elasticsearch/whatever/nodes/0/indices/index16/3/index/segments_1 (Too many open files)]; ]] 
[03:58:24,196][WARN ][cluster.action.shard     ] [node1] received shard failed for [index17][0], node[node_hash3], [P], s[INITIALIZING], reason [Failed to start shard, message [IndexShardGatewayRecoveryException[[index17][0] failed recovery]; nested: EngineCreationFailureException[[index17][0] failed to open reader on writer]; nested: FileNotFoundException[/data/elasticsearch/whatever/nodes/0/indices/index17/0/index/segments_1 (Too many open files)]; ]] 
[03:58:24,198][WARN ][cluster.action.shard     ] [node1] received shard failed for [index21][4], node[node_hash3], [P], s[INITIALIZING], reason [Failed to start shard, message [IndexShardGatewayRecoveryException[[index21][4] failed recovery]; nested: EngineCreationFailureException[[index21][4] failed to create engine]; nested: LockReleaseFailedException[Cannot forcefully unlock a NativeFSLock which is held by another indexer component: /data/elasticsearch/whatever/nodes/0/indices/index21/4/index/write.lock]; ]]

节点api的输出

curl -XGET 'http://localhost:9200/_nodes?os=true&process=true&pretty=true'

{ 
  "ok" : true, 
  "cluster_name" : "whatever", 
  "nodes" : { 
    "node_hash1" : { 
      "name" : "node1", 
      "transport_address" : "transportip1", 
      "hostname" : "myhostip1", 
      "version" : "0.20.4", 
      "http_address" : "httpip1", 
      "attributes" : { 
        "data" : "false", 
        "master" : "true" 
      }, 
      "os" : { 
        "refresh_interval" : 1000, 
        "available_processors" : 8, 
        "cpu" : { 
          "vendor" : "Intel", 
          "model" : "Xeon", 
          "mhz" : 2133, 
          "total_cores" : 8, 
          "total_sockets" : 8, 
          "cores_per_socket" : 16, 
          "cache_size" : "4kb", 
          "cache_size_in_bytes" : 4096 
        }, 
        "mem" : { 
          "total" : "7gb", 
          "total_in_bytes" : 7516336128 
        }, 
        "swap" : { 
          "total" : "30gb", 
          "total_in_bytes" : 32218378240 
        } 
      }, 
      "process" : { 
        "refresh_interval" : 1000, 
        "id" : 26188, 
        "max_file_descriptors" : 16384 
      } 
    }, 
    "node_hash2" : { 
      "name" : "node2", 
      "transport_address" : "transportip2", 
      "hostname" : "myhostip2", 
      "version" : "0.20.4", 
      "attributes" : { 
        "master" : "false" 
      }, 
      "os" : { 
        "refresh_interval" : 1000, 
        "available_processors" : 4, 
        "cpu" : { 
          "vendor" : "Intel", 
          "model" : "Xeon", 
          "mhz" : 2400, 
          "total_cores" : 4, 
          "total_sockets" : 4, 
          "cores_per_socket" : 32, 
          "cache_size" : "20kb", 
          "cache_size_in_bytes" : 20480 
        }, 
        "mem" : { 
          "total" : "34.1gb", 
          "total_in_bytes" : 36700303360 
        }, 
        "swap" : { 
          "total" : "0b", 
          "total_in_bytes" : 0 
        } 
      }, 
      "process" : { 
        "refresh_interval" : 1000, 
        "id" : 24883, 
        "max_file_descriptors" : 16384 
      } 
    }, 
    "node_hash3" : { 
      "name" : "node3", 
      "transport_address" : "transportip3", 
      "hostname" : "myhostip3", 
      "version" : "0.20.4", 
      "attributes" : { 
        "master" : "false" 
      }, 
      "os" : { 
        "refresh_interval" : 1000, 
        "available_processors" : 4, 
        "cpu" : { 
          "vendor" : "Intel", 
          "model" : "Xeon", 
          "mhz" : 2666, 
          "total_cores" : 4, 
          "total_sockets" : 4, 
          "cores_per_socket" : 16, 
          "cache_size" : "8kb", 
          "cache_size_in_bytes" : 8192 
        }, 
        "mem" : { 
          "total" : "34.1gb", 
          "total_in_bytes" : 36700303360 
        }, 
        "swap" : { 
          "total" : "0b", 
          "total_in_bytes" : 0 
        } 
      }, 
      "process" : { 
        "refresh_interval" : 1000, 
        "id" : 25328, 
        "max_file_descriptors" : 16384 
      } 
    } 
  }

Answer 1

如何增加允许打开的文件的最大数量取决于您的Linux发行版。以下是有关ubuntu和centos的一些说明：

http://posidev.com/blog/2009/06/04/set-ulimit-parameters-on-ubuntu/


http://pro.benjaminste.in/post/318453669/increase-the-number-of-file-
中心描述符

elasticsearch文档建议将最大文件限制设置为32k或64k。由于您的速度为16k，并且已经达到极限，因此我可能会将其设置为更高。大约128k
请参阅：http :
//www.elasticsearch.org/guide/reference/setup/installation/

增加打开文件的数量并重新启动elasticsearch之后，您将需要通过重新运行您提到的curl命令来验证它是否有效：

curl -XGET 'http://localhost:9200/_nodes?os=true&process=true&pretty=true'

随着您添加更多索引（以及更多文档），您还将看到elasticsearch跟踪增加的文件数。如果您发现所有标记和文档的性能均下降，则可以尝试向集群添加新节点：http
:
//www.elasticsearch.org/guide/reference/setup/configuration/-由于您已经拥有分片，复制配置，这应该是一个相对轻松的过程。