Undefined method `close' for nil:NilClass

Elastic Stack Logstash
1

Hi everyone. I'm a beginner in Logstash and I have some problem with it. It's, returning "The error reported is: undefined method `close' for nil:NilClass". The full report is:

The error reported is:
undefined method close' for nil:NilClass /opt/logstash/vendor/bundle/jruby/1.9/gems/jls-grok-0.11.2/lib/grok-pure.rb:83:inadd_patterns_from_file'
/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-2.0.3/lib/logstash/filters/grok.rb:361:in add_patterns_from_files' org/jruby/RubyArray.java:1613:ineach'
/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-2.0.3/lib/logstash/filters/grok.rb:357:in add_patterns_from_files' /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-2.0.3/lib/logstash/filters/grok.rb:269:inregister'
org/jruby/RubyArray.java:1613:in each' /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-2.0.3/lib/logstash/filters/grok.rb:265:inregister'
org/jruby/RubyHash.java:1342:in each' /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-2.0.3/lib/logstash/filters/grok.rb:261:inregister'
/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.2-java/lib/logstash/pipeline.rb:171:in start_workers' org/jruby/RubyArray.java:1613:ineach'
/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.2-java/lib/logstash/pipeline.rb:171:in start_workers' /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.2-java/lib/logstash/pipeline.rb:123:inrun'
/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.2-java/lib/logstash/agent.rb:211:in execute' /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.2-java/lib/logstash/runner.rb:90:inrun'
org/jruby/RubyProc.java:281:in call' /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.2-java/lib/logstash/runner.rb:95:inrun'
org/jruby/RubyProc.java:281:in call' /opt/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.22/lib/stud/task.rb:24:ininitialize'

Config file is too big, to paste it here, but if that's necessary, i'll send it. Thank you

2

That's my config file for logstash

Cisco ASA

filter {
if "syslog" in [tags] and "pre-processed" not in [tags] {
if "%ASA-" in [message] {
mutate {
add_tag => [ "pre-processed", "Firewall", "ASA" ]
}
grok {
match => [
"message", "<%{POSINT:syslog_pri}>%{CISCOTIMESTAMP:timestamp} %{SYSLOGHOST:sysloghost} %%{CISCOTAG:cisco_tag}: %{GREEDYDATA:cisco_message}"
]
}
syslog_pri { }
grok {
match => [
"cisco_message", "%{CISCOFW106001}",
"cisco_message", "%{CISCOFW106006_106007_106010}",
"cisco_message", "%{CISCOFW106014}",
"cisco_message", "%{CISCOFW106015}",
"cisco_message", "%{CISCOFW106021}",
"cisco_message", "%{CISCOFW106023}",
"cisco_message", "%{CISCOFW106100}",
"cisco_message", "%{CISCOFW110002}",
"cisco_message", "%{CISCOFW302010}",
"cisco_message", "%{CISCOFW302013_302014_302015_302016}",
"cisco_message", "%{CISCOFW302020_302021}",
"cisco_message", "%{CISCOFW305011}",
"cisco_message", "%{CISCOFW313001_313004_313008}",
"cisco_message", "%{CISCOFW313005}",
"cisco_message", "%{CISCOFW402117}",
"cisco_message", "%{CISCOFW402119}",
"cisco_message", "%{CISCOFW419001}",
"cisco_message", "%{CISCOFW419002}",
"cisco_message", "%{CISCOFW500004}",
"cisco_message", "%{CISCOFW602303_602304}",
"cisco_message", "%{CISCOFW710001_710002_710003_710005_710006}",
"cisco_message", "%{CISCOFW713172}",
"cisco_message", "%{CISCOFW733100}",
"cisco_message", "%{WORD:action} %{WORD:protocol} %{CISCO_REASON:reason} from %{DATA:src_interface}:%{IP:src_ip}/%{INT:src_port} to %{DATA:dst_interface}:%{IP:dst_ip}/%{INT:dst_port}; %{GREEDYDATA:dnssec_validation}",
"cisco_message", "%{CISCO_ACTION:action} %{WORD:protocol} %{CISCO_REASON:reason}.(%{IP:src_ip}).%{IP:dst_ip} on interface %{GREEDYDATA:interface}",
"cisco_message", "Connection limit exceeded %{INT:inuse_connections}/%{INT:connection_limit} for input packet from %{IP:src_ip}/%{INT:src_port} to %{IP:dst_ip}/%{INT:dst_port} on interface %{GREEDYDATA:interface}",
"cisco_message", "TCP Intercept %{DATA:threat_detection} to %{IP:ext_nat_ip}/%{INT:ext_nat_port}.*(%{IP:int_nat_ip}/%{INT:int_nat_port}).*Average rate of %{INT:syn_avg_rate} SYNs/sec exceeded the threshold of %{INT:syn_threshold}.#%{INT}",
"cisco_message", "Embryonic connection limit exceeded %{INT:econns}/%{INT:limit} for %{WORD:direction} packet from %{IP:src_ip}/%{INT:src_port} to %{IP:dst_ip}/%{INT:dst_port} on interface %{GREEDYDATA:interface}"
]
}
geoip {
source => "src_ip"
target => "geoip"
add_field => [ "[geoip][coordinates]", "%{[geoip][longitude]}" ]
add_field => [ "[geoip][coordinates]", "%{[geoip][latitude]}" ]
}
mutate {
convert => [ "[geoip][coordinates]", "float" ]
}
date {
match => [ "timestamp", "MMM dd HH:mm:ss", "MMM d HH:mm:ss", "MMM dd yyyy HH:mm:ss", "MMM d yyyy HH:mm:ss", "MMM d HH:mm:ss" ]
timezone => "America/New_York"
}
mutate {
replace => [ "host", "%{sysloghost}" ]
}
}
}
}

output {

Example just to output to elasticsearch

elasticsearch { hosts => localhost }
stdout { }
}

3

Problem solved. There were files with errors in patterns directory. After removing everything works

4

I'm curious—what kind of errors were there? Syntax errors? Permission problems?

5

Syntax errors. In fact these files were not necessary at all, so I removed them. Now there are only nginx and grok patterns in that directory and everything works. Not perfect, but works