elasticsearch报错处理

查询时报错

• es aggs Fielddata is disabled on text fields by default. Set fielddata=true

  PUT megacorp/_mapping/employee/
  {
    "properties": {
      "interests": { 
        "type":     "text",
        "fielddata": true
      }
    }
  }
  GET /megacorp/employee/_search
  {
      "aggs" : {
          "all_interests" : {
              "terms" : { "field" : "interests" },
              "aggs" : {
                  "avg_age" : {
                      "avg" : { "field" : "age" }
                  }
              }
          }
      }
  }
  

安装启动时报错

• max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

  ulimit -Hn
  ulimit -Sn
  vim /etc/security/limits.conf
  # 添加
  *               soft    nproc           4096
  *               hard    nproc           4096
  

• max number of threads [3818] for user [es] is too low, increase to at least [4096]

  ulimit -Hu
  ulimit -Su
  vim /etc/security/limits.conf
  # 添加
  *               soft    nproc           4096
  *               hard    nproc           4096
  

• max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

  vim /etc/sysctl.conf
  # 添加
  vm.max_map_count=262144
  sysctl -p
  

• Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-6.2.2-1/config/jvm.options

  chown -R vagrant:vagrant /usr/local/lib/elasticsearch/