Question

所有，我遇到了一个奇怪的问题。

我有3台MongoDB服务器并将它们组合成replset - 一个是主服务器，另外两个是辅助节点。我的MongoDB客户端是一个Java MongoDB客户端，Spring环境。

我使用haproxy指向replset节点。

有时当我连接到haproxy时，mongo客户端会抛出以下异常：

message:Exception found: Prematurely reached end of stream; nested exception is com.mongodb.MongoSocketReadException: Prematurely reached end of stream

当我重试时，它会消失，几分钟后它会再次出现。

我的haproxy配置如下所示：

global
  daemon
  user vcap
  group vcap
  log /dev/log daemon info
  maxconn 4096

defaults
  log global
  option dontlognull
  mode  tcp
  timeout connect  5000ms
  timeout client  30000ms
  timeout server  30000ms
  retries   3
  option redispatch

# admin gui
listen stats
bind :8080
mode http
stats enable
stats uri /stats

default-server  on-error fastinter error-limit 3 inter 3000ms fastinter 1000ms downinter 300s fall 3

frontend fe_mongo_27027_tcp
  bind 0.0.0.0:27027
  mode tcp
  option tcplog
  use_backend be_mongo_27027_tcp

backend be_mongo_27027_tcp
  mode tcp
  option tcp-check
  # mongodb wire protocol
  tcp-check send-binary 3a000000 # Message Length (58)
  tcp-check send-binary EEEEEEEE # Request ID (random value)
  tcp-check send-binary 00000000 # Response To (nothing)
  tcp-check send-binary d4070000 # OpCode (Query)
  tcp-check send-binary 00000000 # Query Flags
  tcp-check send-binary 61646d696e2e # fullCollectionName (admin.$cmd)
  tcp-check send-binary 24636d6400 # continued
  tcp-check send-binary 00000000 # NumToSkip
  tcp-check send-binary FFFFFFFF # NumToReturn
  # Start of Document
  tcp-check send-binary 13000000 # Document Length (19)
  tcp-check send-binary 10 # Type (Int32)
  tcp-check send-binary 69736d617374657200 # ismaster:
  tcp-check send-binary 01000000 # Value : 1
  tcp-check send-binary 00 # Term

  tcp-check expect binary 69736d61737465720001 #ismaster True
  # mongodb check end

  option tcplog
  option tcpka

  server mongodb-10.62.90.175 10.62.90.175:27017 check inter 2000

  server mongodb-10.62.90.176 10.62.90.176:27017 check inter 2000

  server mongodb-10.62.90.174 10.62.90.174:27017 check inter 2000

Answer 1

这是由于超时设置，连接关闭所以mongo客户端无法接收二进制文件，现在我删除了超时设置，现在可以正常工作。

mongodb连接抛出MongoSocketReadException

1 个答案: