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  1. Core Server
  2. SERVER-7447

Sharded legacy-static build goes into uninterruptible sleep on kernel 2.6.16

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 2.2.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Operating System:
      ALL

      Description

      https://groups.google.com/forum/?fromgroups=#!topic/mongodb-user/iKEK4ZISvSc

      These days, i need to scale out my single node mongodb service into a
      mongodb cluster.
      I use 2 machines to set up a mongodb cluster, it includes 2 shards(mongod
      process), 1 config process and 1 mongs process. The details are as the
      follow:

      step1. start config process
      bin/mongod --bind_ip 10.163.138.87 --configsvr --fork --dbpath
      /data/mongodb/config --logpath /data/mongodb/log/config.log --logappend --port
      20000
      step2. start shard services
      bin/mongod --bind_ip 10.163.138.87 --fork --shardsvr --port 10000 --dbpath
      /data/mongodb/data --logpath /data/mongodb/log/mongod.log --logappend
      bin/mongod --bind_ip 10.163.138.88 --fork --shardsvr --port 10000 --dbpath
      /data/mongodb/data --logpath /data/mongodb/log/mongod.log --logappend
      step3. start mongos service
      bin/mongos --bind_ip 10.163.138.87 --port 30000 --fork --configdb
      10.163.138.87:20000 --logpath /data/mongodb/log/mongos.log --logappend
      step4. log on the mongos and config shards
      bin/mongo 10.163.138.87:30000
      mongos> use admin
      mongos> db.runCommand(

      {addshard:"10.163.138.87:10000"}

      )

      mongos> db.runCommand(

      {addshard:"10.163.138.88:10000"}

      )

      mongos> db.runCommand(

      { "enablesharding" : "query"}

      )

      mongos> db.runCommand({ "shardcollection" : "query.DailyPcQueryStats",
      "key" :{ "d":1, "qpc":1, "ua" : 1}})
      step5: use mongoimport to insert data into the collection "
      query.DailyPcQueryStats".
      But...
      The problem ocurrs. when I inserting into collections, the mongd process
      turn into a state of 'uninterruptable sleep', and can not recover. Other
      processes accessing the same disk also get into the same state, and I can't
      even reboot the system with commands. The ONLY thing I can do is to press
      the reboot button.

      And i test the 2 machines as stand-alone mongodb service. And i almost
      import over 300 million data, it's ok.
      I wonder why the mongodb cluster perform like this? Where is the problem?

      And i test like this: I start all mongodb cluster processes on 1 machine(
      10.163.138.88), include 2 shards, 1 config, 1 mongos. And I insert data
      into it, it is ok!!! Too strangeļ¼
      Single node is ok, multi node has problem?

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            Assignee:
            Unassigned Unassigned
            Reporter:
            gregor Gregor Macadam
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              Created:
              Updated:
              Resolved: