From b90bce9fd0aa040e27f605e75b09f3e881e011b6 Mon Sep 17 00:00:00 2001
From: Manfred Karrer <mk@nucleo.io>
Date: Sun, 26 Nov 2017 11:33:06 -0500
Subject: [PATCH] BlockingClient: Do not close socket if it is already closed.

Cherry-pick https://github.com/bisq-network/bitcoinj/commit/58de2b53435f9f15a828b77b17e3f9ddbad729d2
---
 .../main/java/org/bitcoinj/net/BlockingClient.java    | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/core/src/main/java/org/bitcoinj/net/BlockingClient.java b/core/src/main/java/org/bitcoinj/net/BlockingClient.java
index a6762b269a2..fc0873e001f 100644
--- a/core/src/main/java/org/bitcoinj/net/BlockingClient.java
+++ b/core/src/main/java/org/bitcoinj/net/BlockingClient.java
@@ -145,11 +145,14 @@ public void closeConnection() {
     @Override
     public synchronized void writeBytes(byte[] message) throws IOException {
         try {
-            OutputStream stream = socket.getOutputStream();
-            stream.write(message);
-            stream.flush();
+            if(!socket.isClosed()) {
+                OutputStream stream = socket.getOutputStream();
+                stream.write(message);
+                stream.flush();
+            }
         } catch (IOException e) {
-            log.error("Error writing message to connection, closing connection", e);
+            if(!(e instanceof SocketException && e.toString().equals("Socket is closed")))
+                log.error("Error writing message to connection, closing connection", e);
             closeConnection();
             throw e;
         }