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TCP is normally disconnected, and both parties (both the server and the client) can know. However, unusual disconnection occurs. for example, if the network cable is directly Unplugged, the following two methods can be used to detect the network in a short time. I. Heartbeat packet mechanism the Heartbeat packet mechanism is a common mechanism in online game design. From the user level, send your own packets to determine the connection status of the o

background : Some days ago the team in the terminal equipment and server long connection business testing, found that a situation: after unplugging the device side of the network cable, and then plug in the network cable, and sometimes can continue to normal long-run requests, and the use or unplug the cable before the long connection. However, sometimes it is not possible to continue the normal long connection request and need to reestablish a new long connection. I am particularly surprised th

name types, and display them separately and exit separately. Method Content: When a computer is connected to many USB ports, a small floating box is displayed on the computer. When a USB port is connected, automatically identifies the device information name connected to this data line interface. For example, after the iPhone connects to the mobile phone and the computer, the floating window records that the port is connected to the iPhone, MP3 and so on will display MP3 information, the prin

complete, the broadcast (move refers to: APP2SD) intent.action_external_applications_ available;//when the app is being moved, the broadcast (move means: APP2SD) intent.action_external_applications_unavailable;// GTALK broadcast in which a broadcast intent.action_gtalk_service_connected;//gtalk has been disconnected when the connection is madeTent. action_gtalk_service_disconnected;//broadcast intent.action_headset_plug;//When a headset is inserted on the headphone port to change the input meth

implicit Intent.Low power consumption modeAndroid 6.0 (API level 23) introduces a low-power mode that delays CPU and network activity when the user device is unplugged, in a stationary state, and the screen is turned off, prolonging battery life. Android N further enhances the low-power mode by applying some CPU and network restrictions when the device is unplugged and the screen is off, but not necessaril

) intent.action_external_applications_available;//the broadcast when the app is being moved (move means: APP2SD) Intent.action_external_applications_unavailable;//gtalk broadcast intent.action_gtalk_service_connected;//When a connection has been established GTALK broadcast intent.action_gtalk_service_disconnected;//When a headset is plugged into the headphone port when the connection is disconnected intent.action_headset_plug;// Broadcast intent.action_input_method_changed;//when changing the IM

interface loose, Remove the motherboard with a soldering iron can be, or a live unplugged keyboard, causing the motherboard on a security block (marked on the motherboard for FN), replaced by a 1 ohms/0.5 watts of resistance can be. Third, integrated on the motherboard of the display adapter failure Generally speaking, the computer power-on a few sound, most of the motherboard memory is not plugged in or display adapter failure. There is a great Wa

:0 Permanent HW addr:00:0c:29:6e:40:9d Slave interface:eth1 MII Status:up Link Failure count:0 Permanent HW Addr:00:0c:29:6e:40:a7 If this is the Eth0 The Connected network cable is unplugged, Eth1 will be replaced by becoming Active Currently Active Slave:eth0 Slave Interface:eth0 MII Status:down Slave interface:eth1 MII Status:up Show Bonding The mode 1 , is a kind of main standby HA of the model. Ethernet Channel Bonding Driver:v2.6.3-rh (Ju

, the switch is turned on, then the MAC OS x system will know that a headset is plugged in, so the built-in speaker off, from the headset output sound signal, after the headset unplugged, switch automatically closed. Careful users can find changes in the system, see the following figure, insert headphones and the sound changes in the system when the headset is not plugged in: And one of the following is clear. The problem is

stopped responding and has recovered" error message, you can press the computer power button to reboot the machine * The computer stops responding or restarts when playing a video game or performing a desktop operation * When a computer overload (task is heavy) or the DPS (diagnostic Policy Service, diagnostic policy services) stops responding when there is very little available memory, this problem prevents the diagnostics from running * The screen is blank when the external display device

be charged when using the AC power adapter (side charging state). 4. When the battery is 96~100% or the battery has been removed from the machine, you can use the AC power adapter to start the operation, using AC power adapter, please first plug the AC power adapter DC output plug into the machine, and then plug the AC power plug into the 220v~ socket; When removing the AC power adapter, unplug the AC power adaptor before unplugging the AC power adapter's DC output plug from the machine. Failu

Uicccard itself does not implement specific functions, just as an indirect interface to Uicccontroller to provide uicccardapplication objects and complete the creation of catservice work, And when the SIM card is plugged in or unplugged, the prompt box will need to restart the device. first, the main function of Uicccard We look at its functionality from the main methods provided by Uicccard. [Java] view plain Copy public boolean ISAPPLICATIONONICC

. KeepAliveInterval is the hardcoded for 1 seconds.Note that SQL Server's native Client also has a similar configuration and does not mix with the TCP configuration of server side.Server-Side TCP connections and TCP connections to clients each send their own keepalive packetsSQL Server does not shut down a normal TCP connection. Unless the underlying TCP reports an error. or error connecting or receiving data. Query Sys.dm_exec_connections compare output inside the Last_read/last_write and now t

Tags: ora-65085Sql> Show Con_nameCon_name------------------------------Cdb$rootSql> Show PDBscon_id con_name OPEN MODE RESTRICTED---------- ------------------------------ ---------- ---------- 2 pdb$seed READ only NO 3 PDB READ WRITE NO 4 TEST mountedSql> Show Con_nameCon_name------------------------------Cdb$rootsql> alter pluggable database test open read only;Alter pluggable database test open Read Only*ERROR at line 1:Ora-65085:cannot Open Pluggable database in read-only modeSql> Col Pdb