Stdout codec json_lines is empty

Hi there,

I'm still trying to connect my postgresql database to elastic. I've got all the required files:
logstash.yml, pipelines.yml and p1.conf (in my local/etc/logstash). However I'm only getting Successfully started Logstash API endpoint and no result, if I run logstash --debug I get: stdout { codec => json_lines } ```]

So it's empty...
Here are some lines I'm also getting from the debug:

config LogStash::Inputs::Jdbc/@statement = "SELECT * from phpbb_banlist"
config LogStash::Inputs::Jdbc/@jdbc_validation_timeout = 3600
config LogStash::Inputs::Jdbc/@connection_retry_attempts = 1
config LogStash::Inputs::Jdbc/@connection_retry_attempts_wait_time = 0.5

[DEBUG][] PageIO recovery element index:0, readNextElement exception: Element invalid length

[DEBUG][logstash.javapipeline ] Starting pipeline {:pipeline_id=>"my-pipeline_1"}

[WARN ][org.logstash.instrument.metrics.gauge.LazyDelegatingGauge][my-pipeline_1] A gauge metric of an unknown type (org.jruby.RubyArray) has been create for key: cluster_uuids. This may result in invalid serialization. It is recommended to log an issue to the responsible developer/development team.

[INFO ][logstash.javapipeline ][my-pipeline_1] Starting pipeline {:pipeline_id=>"my-pipeline_1", "pipeline.workers"=>1, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>50, "pipeline.max_inflight"=>125, "pipeline.sources"=>["/usr/local/etc/logstash/p1.conf"], :thread=>"#<Thread:0x2dc0c9bc run>"}

[logstash.javapipeline ][my-pipeline_1] Pipeline started {""=>"my-pipeline_1"}

[DEBUG][logstash.javapipeline ] Pipeline started successfully {:pipeline_id=>"my-pipeline_1", :thread=>"#<Thread:0x2dc0c9bc run>"}

[DEBUG][org.logstash.execution.PeriodicFlush][my-pipeline_1] Pushing flush onto pipeline.

[INFO ][logstash.agent ] Pipelines running {:count=>1, :running_pipelines=>[:"my-pipeline_1"], :non_running_pipelines=>[]}

[DEBUG][logstash.agent ] Starting puma

[DEBUG][logstash.agent ] Trying to start WebServer {:port=>9600}

[DEBUG][logstash.api.service ] [api-service] start

[INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9600}

[DEBUG][logstash.inputs.jdbc ][my-pipeline_1] loading ~/Desktop/postgresql-42.2.9.jar

[DEBUG][logstash.inputs.jdbc ] config LogStash::Inputs::Jdbc/@use_prepared_statements = false
[DEBUG][logstash.inputs.jdbc ] config LogStash::Inputs::Jdbc/@prepared_statement_name = ""

Maybe somebody can help me to sync my postgresql database with elastic (because it's taking forever this way), I've been searching the web for a solution for a long time. I was thinking the problem is the prepared statement being empty but my .conf file is all in order and as simple as can be.

Also my configuration file is like the following:

input {
jdbc {
# Postgres jdbc connection string to our database,
jdbc_connection_string => "jdbc:postgresql://hostname:port/databasename"

    # The user we wish to execute our statement as
    jdbc_user => "USER"

#password for the user
jdbc_password => "PASSWORD"

jdbc_validate_connection => true

    # The path to our downloaded jdbc driver
    jdbc_driver_library => "~/Desktop/postgresql-42.2.9.jar"

    # The name of the driver class for Postgresql
    jdbc_driver_class => "org.postgresql.Driver"

    # our query
    statement => 'select * from phpbb_banlist'

output {
stdout { codec => json_lines }

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