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  1. Teiid
  2. TEIID-5430

Closing Teiid JDBC connection is delayed 5 seconds

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major Major
    • 11.1, 8.12.15.6_4
    • 8.12.13.6_4
    • JDBC Driver
    • None
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      1. JDBCClient connect to teiid server, and sleep before closing connection.
      2. SIGSTIOP teiid server. (kill -sigstop <PID>)
      3. JDBCClient invokes Connection#close() after sleep.
      4. You can see the behavior that the closing takes a time 5 seconds.

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      1. JDBCClient connect to teiid server, and sleep before closing connection. 2. SIGSTIOP teiid server. (kill -sigstop <PID>) 3. JDBCClient invokes Connection#close() after sleep. 4. You can see the behavior that the closing takes a time 5 seconds.

      Teiid JDBC Driver waits 5 seconds during closing connection when the client can not reach teiid server.
      If many connections are pooling by the client as a Datasource, it takes more time the closing all connections.
      e.g. if the datasource has 50 connections, the close time would be 5 seconds * 50.

      [1] is the stacktrace whie the connection is closing with the delay.
      When closing connection, teiid JDBC waits server response by Future#get() with timeout of 5 seconds.
      So, it would be waiting for the time if the socket doesn't receive any response.

      [1] Stacktrace when the connection waits 5 seconds.

      "main" #1 prio=5 os_prio=0 tid=0x00007f5b1c009000 nid=0x707b runnable [0x00007f5b238ac000]
   java.lang.Thread.State: RUNNABLE
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
	at java.net.SocketInputStream.read(SocketInputStream.java:171)
	at java.net.SocketInputStream.read(SocketInputStream.java:141)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
	- locked <0x000000071c98cad0> (a org.teiid.core.util.AccessibleBufferedInputStream)
	at java.io.DataInputStream.readInt(DataInputStream.java:387)
	at org.teiid.netty.handler.codec.serialization.ObjectDecoderInputStream.readObjectOverride(ObjectDecoderInputStream.java:97)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:416)
	at org.teiid.net.socket.OioOjbectChannelFactory$OioObjectChannel.read(OioOjbectChannelFactory.java:117)
	at org.teiid.net.socket.SocketServerInstanceImpl.read(SocketServerInstanceImpl.java:308)
	at org.teiid.net.socket.SocketServerInstanceImpl$RemoteInvocationHandler$1.get(SocketServerInstanceImpl.java:411)
	at org.teiid.net.socket.SocketServerConnection.logoff(SocketServerConnection.java:331)
	at org.teiid.net.socket.SocketServerConnection.close(SocketServerConnection.java:306)
	- locked <0x000000071c51bb48> (a org.teiid.net.socket.SocketServerConnection)
	at org.teiid.jdbc.ConnectionImpl.close(ConnectionImpl.java:282)
	at ClientMain.invoke(ClientMain.java:83)
	at ClientMain.main(ClientMain.java:30)

      [2]
      https://github.com/teiid/teiid/blob/master/client/src/main/java/org/teiid/net/socket/SocketServerConnection.java#L319-L329

      	private void logoff() {
		disconnect();
		try {
			//make a best effort to send the logoff
			Future<?> writeFuture = this.serverInstance.getService(ILogon.class).logoff();
			writeFuture.get(5000, TimeUnit.MILLISECONDS);
		} catch (Exception e) {
			//ignore
		}
		closeServerInstance();
	}

        1. JDBCClient.java
          1 kB

              rhn-engineering-shawkins Steven Hawkins
              rhn-support-hdaicho Hiroki Daicho (Inactive)
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                Created:
                Updated:
                Resolved: