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Article - CS305804

"One or more value change updates lost due to insufficient space in the connection buffer" is seen in KEPServerEX / ThingWorx Kepware Server when attempting to update properties on ThingWorx Platform

Modified: 05-Nov-2024   


Applies To

  • Kepware Server (formerly KEPServerEX) 6.0.2107.0 N/A to 6.16
  • ThingWorx Kepware Server (legacy) 8.4 F000 to 6.16
  • ThingWorx Platform 8.3 to 9.6

Description

  • KEPServerEX Tags are bound to ThingWorx as remote Properties and some or all of these properties are no longer updated any more 
  • Sudden Kepware Connection broken and Remote Thing property not updating
  • Property update is dropped on Kepware side
  • We have a local Thing properties bind from a Remote Thing, and the bound local Thing property is not updating according to the Remote Thing property value change
  • Logs shows the following messages:
    • KEPServerEX / ThingWorx Kepware Server Event Log 
      • Warning         ThingWorx Native Interface    Error pushing property updates to thing. | Thing name = <'Thing Name'>'.
Information     ThingWorx Native Interface    Resumed pushing property updates to thing: the error condition was resolved. | Thing name = <'Thing Name'>'.
Error           ThingWorx Native Interface    One or more value change updates lost due to insufficient space in the connection buffer. | Number of lost updates = <number of lost updates>.
      • Error          ThingWorx Native Interface Connection to ThingWorx failed. | Platform = <ThingWorx Host>:<ThingWorx Port>/Thingworx/WS, error = could not initialize a secure socket connection.
Error          ThingWorx Native Interface Connection to ThingWorx failed. | Platform = <ThingWorx Host>:<ThingWorx Port>/Thingworx/WS, error = unknown error.
      • 接続バッファの容量不足により値変更更新が失われました
    • <ThingworxStorage>\logs\ApplicationLog.log 
      • [L: ERROR] [O: c.t.p.i.p.InfluxdbBatchValueStreamDataProcessor] [I: ] [U: SuperUser] [S: ] [P: ] [T: pool-10-thread-4] Unable to write entry in stream <[Value Stream Name]>[com.thingworx.common.exceptions.DataAccessException: [2,006] Unknown error occurred. Contact the administrator if this re-occurs.]
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