java.net.ConnectException: Connection refused: connect

Salesforce | Sheikh Zubair | 3 years ago
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Root Cause Analysis

  1. java.net.ConnectException

    Connection refused: connect

    at java.net.DualStackPlainSocketImpl.waitForConnect()
  2. Java RT
    Socket.connect
    1. java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    2. java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    3. java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    4. java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    5. java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    6. java.net.PlainSocketImpl.connect(Unknown Source)
    7. java.net.SocksSocketImpl.connect(Unknown Source)
    8. java.net.Socket.connect(Unknown Source)
    8 frames
  3. Java JSSE
    SSLSocketImpl.connect
    1. sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
    1 frame
  4. Apache HttpClient
    CloseableHttpClient.execute
    1. org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:524)
    2. org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:403)
    3. org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
    4. org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)
    5. org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
    6. org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
    7. org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
    8. org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    9. org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
    9 frames
  5. com.wipro.coe
    TestCallout.main
    1. com.wipro.coe.Action.TestCallout.oAuthSessionProvider(TestCallout.java:54)
    2. com.wipro.coe.Action.TestCallout.main(TestCallout.java:98)
    2 frames