How to parse XML using XPATH from SOAP API in Logstash

Hello Everyone, I hope you are good, I have this issue with logstash filter using Xpath,
I Don't really know if the xpath I Pass is wrong the error I'm getting from cmd is kinda syntax error....

What I'm seeing is like in the error log is /soapenv:Envelope[@ :but after the @ in the code follows a line that is xmlns and I think logstash are not understanding the xpath correctly if anyone could help me with this would be my hero, Im in the last step.

my conf:

        input {
        http_poller {
        urls => {
        testVersion => {
        method => post
        user => 'API_USER'
        password => "API_PASS"
        url => "http://testapm.osde.ar:8081/introscope-web-services/services/MetricsDataService"
        headers => {
         
        "Content-Type" => "text/xml; charset=UTF-8"
        "SOAPAction" => "urn:mc_version"
        }

        body => '<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:met="http://metricsdata.webservicesimpl.server.introscope.wily.com">
           <soapenv:Header/>
           <soapenv:Body>
              <met:getLiveMetricData soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
                 <agentRegex xsi:type="xsd:string">.*\|Custom Metric Process \(Virtual\)\|Custom Metric Agent \(Virtual\)</agentRegex>
                 <metricPrefix xsi:type="xsd:string">Alerts\|[^|]+:.*Summary.*</metricPrefix>
              </met:getLiveMetricData>
           </soapenv:Body>
        </soapenv:Envelope>'
        }
        }
        request_timeout => 30
        schedule => {'every' => "30s" }
        codec => "plain"
        # A hash of request metadata info (timing, response headers, etc.) will be sent here
        metadata_target => "http_poller_metadata"
        }
        }

        filter {
          xml {
            remove_namespaces => true
            source => "message"
            target => "doc"
            xpath => ['/soapenv:Envelope[@xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"]/soapenv:Body/multiRef/agentName[@xsi:type="xsd:string"]/text()', 'new_field']
               
          }

        }

        output {

        stdout {
        codec => rubydebug
        }
        }

Error log:


        [2020-03-17T14:55:51,779][ERROR][org.logstash.execution.WorkerLoop][main] Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash.
    org.jruby.exceptions.RaiseException: (SyntaxError) /soapenv:Envelope[@ :soapenv="http://schemas.xmlsoap.org/soap/envelope/"]/soapenv:Body/multiRef/agentName[@xsi:type="xsd:string"]/text()
            at nokogiri.XmlXpathContext.evaluate(nokogiri/XmlXpathContext.java:128) ~[nokogiri.jar:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.nokogiri_minus_1_dot_10_dot_8_minus_java.lib.nokogiri.xml.searchable.xpath_impl(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/nokogiri-1.10.8-java/lib/nokogiri/xml/searchable.rb:198) ~[?:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.nokogiri_minus_1_dot_10_dot_8_minus_java.lib.nokogiri.xml.searchable.xpath_internal(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/nokogiri-1.10.8-java/lib/nokogiri/xml/searchable.rb:179) ~[?:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.nokogiri_minus_1_dot_10_dot_8_minus_java.lib.nokogiri.xml.searchable.xpath(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/nokogiri-1.10.8-java/lib/nokogiri/xml/searchable.rb:154) ~[?:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.logstash_minus_filter_minus_xml_minus_4_dot_0_dot_7.lib.logstash.filters.xml.filter(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/logstash-filter-xml-4.0.7/lib/logstash/filters/xml.rb:153) ~[?:?]
            at org.jruby.RubyHash.each(org/jruby/RubyHash.java:1428) ~[jruby-complete-9.2.9.0.jar:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.logstash_minus_filter_minus_xml_minus_4_dot_0_dot_7.lib.logstash.filters.xml.filter(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/logstash-filter-xml-4.0.7/lib/logstash/filters/xml.rb:152) ~[?:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.filters.base.do_filter(C:/logstash-7.6.1/logstash-core/lib/logstash/filters/base.rb:143) ~[?:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.filters.base.multi_filter(C:/logstash-7.6.1/logstash-core/lib/logstash/filters/base.rb:162) ~[?:?]
            at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1814) ~[jruby-complete-9.2.9.0.jar:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.filters.base.multi_filter(C:/logstash-7.6.1/logstash-core/lib/logstash/filters/base.rb:159) ~[?:?]
            at org.logstash.config.ir.compiler.AbstractFilterDelegatorExt.multi_filter(org/logstash/config/ir/compiler/AbstractFilterDelegatorExt.java:115) ~[logstash-core.jar:?]
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.java_pipeline.start_workers(C:/logstash-7.6.1/logstash-core/lib/logstash/java_pipeline.rb:262) ~[?:?]
    warning: thread "[main]>worker2" terminated with exception (report_on_exception is true):
    java.lang.IllegalStateException: org.jruby.exceptions.RaiseException: (SyntaxError) /soapenv:Envelope[@ :soapenv="http://schemas.xmlsoap.org/soap/envelope/"]/soapenv:Body/multiRef/agentName[@xsi:type="xsd:string"]/text()
            at org.logstash.execution.WorkerLoop.run(org/logstash/execution/WorkerLoop.java:85)
            at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:498)
            at org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:441)
            at org.jruby.javasupport.JavaMethod.invokeDirect(org/jruby/javasupport/JavaMethod.java:305)
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.java_pipeline.start_workers(C:/logstash-7.6.1/logstash-core/lib/logstash/java_pipeline.rb:262)
            at org.jruby.RubyProc.call(org/jruby/RubyProc.java:274)
            at java.lang.Thread.run(java/lang/Thread.java:748)
    Caused by: org.jruby.exceptions.RaiseException: (SyntaxError) /soapenv:Envelope[@ :soapenv="http://schemas.xmlsoap.org/soap/envelope/"]/soapenv:Body/multiRef/agentName[@xsi:type="xsd:string"]/text()
            at nokogiri.XmlXpathContext.evaluate(nokogiri/XmlXpathContext.java:128)
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.nokogiri_minus_1_dot_10_dot_8_minus_java.lib.nokogiri.xml.searchable.xpath_impl(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/nokogiri-1.10.8-java/lib/nokogiri/xml/searchable.rb:198)
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.nokogiri_minus_1_dot_10_dot_8_minus_java.lib.nokogiri.xml.searchable.xpath_internal(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/nokogiri-1.10.8-java/lib/nokogiri/xml/searchable.rb:179)
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.nokogiri_minus_1_dot_10_dot_8_minus_java.lib.nokogiri.xml.searchable.xpath(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/nokogiri-1.10.8-java/lib/nokogiri/xml/searchable.rb:154)
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.logstash_minus_filter_minus_xml_minus_4_dot_0_dot_7.lib.logstash.filters.xml.filter(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/logstash-filter-xml-4.0.7/lib/logstash/filters/xml.rb:153)
            at org.jruby.RubyHash.each(org/jruby/RubyHash.java:1428)
            at C_3a_.logstash_minus_7_dot_6_dot_1.vendor.bundle.jruby.$2_dot_5_dot_0.gems.logstash_minus_filter_minus_xml_minus_4_dot_0_dot_7.lib.logstash.filters.xml.filter(C:/logstash-7.6.1/vendor/bundle/jruby/2.5.0/gems/logstash-filter-xml-4.0.7/lib/logstash/filters/xml.rb:152)
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.filters.base.do_filter(C:/logstash-7.6.1/logstash-core/lib/logstash/filters/base.rb:143)
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.filters.base.multi_filter(C:/logstash-7.6.1/logstash-core/lib/logstash/filters/base.rb:162)
            at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1814)
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.filters.base.multi_filter(C:/logstash-7.6.1/logstash-core/lib/logstash/filters/base.rb:159)
            at org.logstash.config.ir.compiler.AbstractFilterDelegatorExt.multi_filter(org/logstash/config/ir/compiler/AbstractFilterDelegatorExt.java:115)
            at C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.java_pipeline.start_workers(C:/logstash-7.6.1/logstash-core/lib/logstash/java_pipeline.rb:262)
    [2020-03-17T14:55:51,870][FATAL][logstash.runner          ] An unexpected error occurred! {:error=>java.lang.IllegalStateException: org.jruby.exceptions.RaiseException: (SyntaxError) /soapenv:Envelope[@ :soapenv="http://schemas.xmlsoap.org/soap/envelope/"]/soapenv:Body/multiRef/agentName[@xsi:type="xsd:string"]/text(), :backtrace=>["org.logstash.execution.WorkerLoop.run(org/logstash/execution/WorkerLoop.java:85)", "java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:498)", "org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:441)", "org.jruby.javasupport.JavaMethod.invokeDirect(org/jruby/javasupport/JavaMethod.java:305)", "C_3a_.logstash_minus_7_dot_6_dot_1.logstash_minus_core.lib.logstash.java_pipeline.start_workers(C:/logstash-7.6.1/logstash-core/lib/logstash/java_pipeline.rb:262)", "org.jruby.RubyProc.call(org/jruby/RubyProc.java:274)", "java.lang.Thread.run(java/lang/Thread.java:748)"]}
    [2020-03-17T14:55:51,888][ERROR][org.logstash.Logstash    ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit

This was solved, Solution was change the Xpath to
/soapenv:Envelope/soapenv:Body/multiRef/metricValue/text()