# Cannot accept connection from remote address /127.0.103.1

**URL:** <https://discuss.gradle.org/t/cannot-accept-connection-from-remote-address-127-0-103-1/1762>\
**Category:** Old Forum Archive\
**Created:** [April 30, 2014, 5:06am UTC](https://discuss.gradle.org/t/cannot-accept-connection-from-remote-address-127-0-103-1/1762 "2014-04-30T05:06:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Leszek\_Bartkowski](https://avatars.discourse-cdn.com/v4/letter/l/9d8465/32.png) [@Leszek\_Bartkowski](https://discuss.gradle.org/u/Leszek_Bartkowski)\
**Post date:** [April 30, 2014, 5:06am UTC](https://discuss.gradle.org/t/cannot-accept-connection-from-remote-address-127-0-103-1/1762/1 "2014-04-30T05:06:00Z")

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I am getting following error when trying to run my junit tests on some linux server:

```gradle
Cannot accept connection from remote address /127.0.103.1.
Unexpected exception thrown.
org.gradle.messaging.remote.internal.MessageIOException: Could not read message from '/127.0.0.1:47300'.
        at org.gradle.messaging.remote.internal.inet.SocketConnection.receive(SocketConnection.java:88)
        at org.gradle.messaging.remote.internal.hub.MessageHub$ConnectionReceive.run(MessageHub.java:230)
        at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: com.esotericsoftware.kryo.KryoException: Buffer underflow.
        at com.esotericsoftware.kryo.io.Input.require(Input.java:162)
        at com.esotericsoftware.kryo.io.Input.readByte(Input.java:255)
        at org.gradle.messaging.remote.internal.hub.InterHubMessageSerializer$MessageReader.read(InterHubMessageSerializer.java:64)
        at org.gradle.messaging.remote.internal.hub.InterHubMessageSerializer$MessageReader.read(InterHubMessageSerializer.java:53)
        at org.gradle.messaging.remote.internal.inet.SocketConnection.receive(SocketConnection.java:83)
        ... 5 more

```

I’m ussing gradle wrapper:

```gradle
[xxx@xxxGradlePlayground]$ ./gradlew -v
Picked up _JAVA_OPTIONS: -Xmx384M
  ------------------------------------------------------------
Gradle 1.9
------------------------------------------------------------
  Build time:
 2013-11-19 08:20:02 UTC
Build number: none
Revision:
   7970ec3503b4f5767ee1c1c69f8b4186c4763e3d
  Groovy:
     1.8.6
Ant:
        Apache Ant(TM) version 1.9.2 compiled on July 8 2013
Ivy:
        2.2.0
JVM:
        1.7.0_51 (Oracle Corporation 24.51-b03)
OS:
         Linux 3.10.19-2 amd64

```

Compilations/jarring works without problem. Also everything works fine on my own laptop.

Some problem with firewall? These tests do nothing with network though…

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<div class="post-metadata">

**Author:** ![Peter\_Niederwieser](https://avatars.discourse-cdn.com/v4/letter/p/9f8e36/32.png) [@Peter\_Niederwieser](https://discuss.gradle.org/u/Peter_Niederwieser)\
**Post date:** [April 30, 2014, 6:12am UTC](https://discuss.gradle.org/t/cannot-accept-connection-from-remote-address-127-0-103-1/1762/2 "2014-04-30T06:12:00Z")

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Gradle needs to be able to accept connections from other Gradle processes on the same machine. For some reason, this isn’t working out here.

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<div class="post-metadata">

**Author:** ![Leszek\_Bartkowski](https://avatars.discourse-cdn.com/v4/letter/l/9d8465/32.png) [@Leszek\_Bartkowski](https://discuss.gradle.org/u/Leszek_Bartkowski)\
**Post date:** [April 30, 2014, 6:27am UTC](https://discuss.gradle.org/t/cannot-accept-connection-from-remote-address-127-0-103-1/1762/3 "2014-04-30T06:27:00Z")

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I tried few things and looks like on this machine you can’t bind socket to default loopback address like localhost/127.0.x.x, but need to use other network interface e.g. hostname/10.1.0.3. Does gradle always use loopback or is it possible to override this?

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<div class="post-metadata">

**Author:** ![Peter\_Niederwieser](https://avatars.discourse-cdn.com/v4/letter/p/9f8e36/32.png) [@Peter\_Niederwieser](https://discuss.gradle.org/u/Peter_Niederwieser)\
**Post date:** [April 30, 2014, 6:59am UTC](https://discuss.gradle.org/t/cannot-accept-connection-from-remote-address-127-0-103-1/1762/4 "2014-04-30T06:59:00Z")

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From what I can see in the code (‘org.gradle.messaging.remote.internal.inet.InetAddressFactory’), it’s trying to identify loopback addresses on loopback interfaces, which doesn’t appear to be easy in Java 5. This doesn’t seem to be configurable. ‘–debug’ might provide some relevant information.