Read error looking for ack: EOF

Elastic Stack Logstash
1

I am new to ELK stack. My configuration contains logstash-forwarder pushing my server logs to logstash residing in a seperate instance. But recently i found two issues.

  1. Logstash-forwarder is able to connect to logstash server but imediately throwing the error

Setting trusted CA from file: /path/to//logstash-forwarder.crt
2015/08/05 10:18:39.416031 Connecting to [x.x.x.x]:8140
2015/08/05 10:18:39.467751 Connected to x.x.x.x
2015/08/05 10:18:39.543006 Read error looking for ack: EOF

and the same log is repeated again and again

  1. My logstash server seems to be starting fine if i start it as a service but after sometime it stops abruptly. In Logstash.err log i see the following

Error: Your application used more memory than the safety cap of 500M.
Specify -J-Xmx####m to increase it (#### = cap size in MB).
Specify -w for full OutOfMemoryError stack trace

But i dont think my application is taking that much memory. Moreover the same configuration is working in other instances.
versions i am using are: 0.4.0 for logstash-forwarder and 1.4.2 for logstash.

please suggest any fix for this as i could find anything on the internet.

Thanks in advance.

2

What versions of everything are you using? OS?

What is different between the instance you are using here and the other ones that work?

3

I am using EC2 instances for this. OS is Amazon linux with AMI ID: ami-c57c05b2. And regarding the second question there is no difference between the working ones and this one. That is what confuses me the most.

4

I'd upgrade to 1.5.3 for LS for starters.

How much RAM do these instances have?

5

Ram is 2GB out of which around 1GB is free