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  1. Couchbase Server
  2. MB-1947

ns_server is eating up all the connections

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Details

    • Bug
    • Resolution: Fixed
    • 1.6.0 beta3
    • 1.6.0 beta3
    • couchbase-bucket
    • None
    • Operating System: All
      Platform: All

    Description

      OS is REHL. machine is 10.2.1.13

      Tried rebalancing 2 REHL nodes.
      Rebalance hangs and memcahced is unresponsive to telnet or stats.py

      Btw, /opt/NorthScale/1.6.0beta3b/bin/ep_engine/management/stats.py 10.2.1.13:11210 all
      Is hung.
      /opt/NorthScale/1.6.0beta3b/bin/ep_engine/management/stats.py 10.2.1.14:11210 all
      Returns:

      [root@localhost ~]# /opt/NorthScale/1.6.0beta3b/bin/ep_engine/management/stats.py 10.2.1.14:11210 all
      auth_cmds: 0
      auth_errors: 0
      bucket_conns: 2
      bytes_read: 40231
      bytes_written: 4359835
      cas_badval: 0
      cas_hits: 0
      cas_misses: 0
      cmd_flush: 0
      cmd_get: 0
      cmd_set: 0
      conn_yields: 0
      connection_structures: 12
      curr_connections: 12
      curr_items: 0
      daemon_connections: 10
      decr_hits: 0
      decr_misses: 0
      delete_hits: 0
      delete_misses: 0
      ep_bg_fetched: 0
      ep_commit_time: 0
      ep_data_age: 0
      ep_data_age_highwat: 0
      ep_dbinit: 0
      ep_dbname: /opt/NorthScale/1.6.0beta3b/data/ns_1/default
      ep_flush_duration: 0
      ep_flush_duration_highwat: 0
      ep_flusher_state: running
      ep_flusher_todo: 0
      ep_io_num_read: 1024
      ep_io_num_write: 0
      ep_io_read_bytes: 0
      ep_io_write_bytes: 0
      ep_item_commit_failed: 0
      ep_item_flush_failed: 0
      ep_kv_size: 0
      ep_max_data_size: 10485760000
      ep_max_txn_size: 50000
      ep_mem_high_wat: 7864320000
      ep_mem_low_wat: 6291456000
      ep_min_data_age: 0
      ep_num_eject_failures: 0
      ep_num_non_resident: 0
      ep_num_pager_runs: 0
      ep_num_value_ejects: 0
      ep_oom_errors: 0
      ep_overhead: 25773280
      ep_pending_ops: 0
      ep_pending_ops_max: 0
      ep_pending_ops_max_duration: 0 usec
      ep_pending_ops_total: 0
      ep_queue_age_cap: 900
      ep_queue_size: 0
      ep_storage_age: 0
      ep_storage_age_highwat: 0
      ep_storage_type: featured
      ep_tap_keepalive: 0
      ep_too_old: 0
      ep_too_young: 0
      ep_total_cache_size: 0
      ep_total_enqueued: 0
      ep_total_persisted: 0
      ep_version: 1.6.0beta3b_27_g9544aa2
      ep_warmed_up: 0
      ep_warmup: true
      ep_warmup_thread: complete
      ep_warmup_time: 0
      get_hits: 0
      get_misses: 0
      incr_hits: 0
      incr_misses: 0
      libevent: 1.4.13-stable
      limit_maxbytes: 67108864
      mem_used: 25773280
      pid: 19189
      pointer_size: 64
      rejected_conns: 0
      rusage_system: 0.095985
      rusage_user: 0.186971
      threads: 4
      time: 1282517223
      total_connections: 13
      uptime: 1127
      version: 1.4.4_266_ge579964

      From: Sharon Barr
      Sent: Sunday, August 22, 2010 3:44 PM
      To: Dustin Sallings
      Subject: RE: 1.6.0beta3b-41 build is ready

      can you check what’s with 10.2.1.13 (it’s REHL).
      Once you check it out I can try and reproduce this on REHL.

      Sharon

      From: Dustin Sallings
      Sent: Sunday, August 22, 2010 3:43 PM
      To: Sharon Barr
      Subject: Re: 1.6.0beta3b-41 build is ready

      On Aug 22, 2010, at 15:33, Sharon Barr wrote:

      I tried rebalancing without any data and my 10.2.1.13 memcach seem to be on a hung state (no stats on telent, rebalancing is hung - see error below). Can you loging and check it out?

      I tried it on 2 windows machines with data and it still failing, I will update the bug.

      I see timeouts in your log, but nothing like what we were seeing before.

      I can't get stats off your box, either. No idea what to do in this state in Windows. I can't ssh in and attach gdb to see what it's doing. It just isn't responding.


      Dustin Sallings

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            sean@northscale.com Sean Lynch (Inactive)
            sharon.barr@northscale.com sharon.barr@northscale.com
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              Updated:
              Resolved:

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