Logstash 7.10.02 failed to start on windows - logstash

Question

I tried starting the logstash with the below command
logstash-7.10.2\logstash -f logstash.conf
logstash.conf
input{
file{
path => "D://server.log" start_position=> "beginning" type => "logs"
}
}
filter {
grok {
match => {"message" => "%{TIMESTAMP_ISO8601:logtime} \[%{NOTSPACE:thread}\] \[%{LOGLEVEL:loglevel}\] %{GREEDYDATA:line}"
}
}
}
output {
if "ERROR" in [loglevel]
{
elasticsearch {
hosts => ["localhost:9200"]
index => "logstash"
}
}
}
command prompt displayed the below text and did not start logstash.
Using JAVA_HOME defined java: C:\Program Files\Java\jdk1.8.0_221;
WARNING, using JAVA_HOME while Logstash distribution comes with a bundled JDK
warning: ignoring JAVA_OPTS=-Xms64m -Xmx128m -XX:NewSize=64m -XX:MaxNewSize=64m -XX:PermSize=64m -XX:MaxPermSize=64m; pass JVM parameters via LS_JAVA_OPTS
No error logs were created.

Answer 1

Have you tried staring logstash in debug mode .
--log.level DEBUG

Answer 2

Pipeline looks okay. Can you try adding below output to see if you the pattern and log data matches. Just to rule out any grokparsefailures.
output {
stdout { codec => rubydebug }
if "ERROR" in [loglevel]
{
elasticsearch {
hosts => ["localhost:9200"]
index => "logstash"
}
}
}