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Editorial Team
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Asked: 2026-05-27T19:37:34+00:00

I am trying to run 2 projects built using play framework simultaneously but with

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I am trying to run 2 projects built using play framework simultaneously but with little success. This is the error that pops up while trying to run the second instance:

ERROR: transport error 202: bind failed: Address already in use
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized 
FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_E
RROR_TRANSPORT_INIT(197)

I tried changing the http port of one to 9000 and the other to 9001, but still the same error. Any ideas as to how I can get these multiple instances running ? Thanks in advance.

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1 Answer

  1. Editorial Team

    Play uses 2 ports in dev mode. One for http and one for jpda. You can change both in your application.conf file

    http.port=9001
jpda.port=8001
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