Every log posted to Redis (hosted on AWS) via the redis logback appender is throwing Readtimeout execption

Every log posted to Redis via the logback appender is throwing Readtimeout execption, Redis is feeding the ELK stack we can see all logs passing through to Elastic and Kibana, so there is no loss of logs. But could not understand the reason for below exception. Any pointers/help please?

Redis is running on AWS EC2 instance and the log posting app is on my local set up. Strangely this error is not observed when log are posting from a client running with in AWS on another EC2 instance.

     at redis.clients.util.RedisInputStream.ensureFill(RedisInputStream.java:201)
        at redis.clients.util.RedisInputStream.readByte(RedisInputStream.java:40)
        at redis.clients.jedis.Protocol.process(Protocol.java:132)
        at redis.clients.jedis.Protocol.read(Protocol.java:196)
        at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:288)
        at redis.clients.jedis.Connection.getIntegerReply(Connection.java:213)
        at redis.clients.jedis.Jedis.rpush(Jedis.java:797)
        at com.cwbase.logback.RedisAppender.append(RedisAppender.java:43)
        at com.cwbase.logback.RedisAppender.append(RedisAppender.java:16)
        at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88)
        at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
        at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273)
        at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260)
        at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442)
        at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:396)
        at ch.qos.logback.classic.Logger.info(Logger.java:600)
        at org.wmc.sampletest.App.main(App.java:24)
Caused by: java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:152)
        at java.net.SocketInputStream.read(SocketInputStream.java:122)
        at java.net.SocketInputStream.read(SocketInputStream.java:108)
        at redis.clients.util.RedisInputStream.ensureFill(RedisInputStream.java:195)
        ... 16 more