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This article describes the issue about the Orion Server losing connectivity to flow storage server and new flows stop showing up in the Web Console with the followings errors in the logs:
2016-02-02 16:38:05,689 [Flow Listener on port 2055] WARN SolarWinds.Netflow.Processing.PacketListener - Packet queue threshold reached. Dropping packets. Memory Used: 102400 KB
2016-02-02 16:38:06,001  WARN SolarWinds.Netflow.Processing.Workflow.NetFlowPacketWorkflowManager - Packet processing will suspend. Reason: flush queue size is 246 which exceeds threshold 246.
2016-02-02 16:38:06,001  WARN SolarWinds.Netflow.Processing.Workflow.NetFlowPacketWorkflowManager - Packet processing is suspended.
2016-02-02 16:38:06,203 [Flow Listener on port 2055] INFO SolarWinds.Netflow.Processing.PacketListener - Resume receiving packets. Dropped 115988B of data, 85 packets.
NTA version 4.x
This issue occurs due to a lost of connection between the Orion Server and flow Storage database.