Please ignore the below comment from logstash-studio.conf file
#Beats => Logstash => Elasticsearch pipeline
I just realized that entry of path.data in logstash.yml was empty. I updated it to path.data: "/data". Getting the below error now.
Using JAVA_HOME defined java: C:\Program Files\Java\jdk1.8.0_333
WARNING, using JAVA_HOME while Logstash distribution comes with a bundled JDK
C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/vendor/bundle/jruby/2.5.0/gems/bundler-1.17.3/lib/bundler/rubygems_integration.rb:200: warning: constant Gem::ConfigMap is deprecated
Sending Logstash logs to C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logs which is now configured via log4j2.properties
[2022-07-06T12:58:40,573][INFO ][logstash.runner ] Log4j configuration path used is: C:\ELK_Stack\logstash-7.14.0-windows-x86_64\logstash-7.14.0\config\log4j2.properties
[2022-07-06T12:58:40,573][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"7.14.0", "jruby.version"=>"jruby 9.2.19.0 (2.5.8) 2021-06-15 55810c552b Java HotSpot(TM) 64-Bit Server VM 25.333-b02 on 1.8.0_333-b02 +indy +jit [mswin32-x86_64]"}
[2022-07-06T12:58:40,605][INFO ][logstash.setting.writabledirectory] Creating directory {:setting=>"path.queue", :path=>"/data/queue"}
[2022-07-06T12:58:40,605][INFO ][logstash.setting.writabledirectory] Creating directory {:setting=>"path.dead_letter_queue", :path=>"/data/dead_letter_queue"}
[2022-07-06T12:58:40,673][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[2022-07-06T12:58:40,705][INFO ][logstash.agent ] No persistent UUID file found. Generating new UUID {:uuid=>"830564a0-cc98-4678-99f1-1db1e28eccb7", :path=>"/data/uuid"}
[2022-07-06T12:58:42,920][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9600}
[2022-07-06T12:58:43,375][INFO ][org.reflections.Reflections] Reflections took 54 ms to scan 1 urls, producing 120 keys and 417 values
[2022-07-06T12:58:44,160][ERROR][logstash.agent ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"Java::JavaLang::IllegalStateException", :message=>"Unable to configure plugins: Illegal pattern component: U", :backtrace=>["org.logstash.config.ir.CompiledPipeline.<init>(CompiledPipeline.java:119)", "org.logstash.execution.JavaBasePipelineExt.initialize(JavaBasePipelineExt.java:86)", "org.logstash.execution.JavaBasePipelineExt$INVOKER$i$1$0$initialize.call(JavaBasePipelineExt$INVOKER$i$1$0$initialize.gen)", "org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:837)", "org.jruby.ir.runtime.IRRuntimeHelpers.instanceSuper(IRRuntimeHelpers.java:1169)", "org.jruby.ir.runtime.IRRuntimeHelpers.instanceSuperSplatArgs(IRRuntimeHelpers.java:1156)", "org.jruby.ir.targets.InstanceSuperInvokeSite.invoke(InstanceSuperInvokeSite.java:39)", "C_3a_.ELK_Stack.logstash_minus_7_dot_14_dot_0_minus_windows_minus_x86_64.logstash_minus_7_dot_14_dot_0.logstash_minus_core.lib.logstash.java_pipeline.RUBY$method$initialize$0(C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logstash-core/lib/logstash/java_pipeline.rb:47)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:80)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:70)", "org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:333)", "org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:87)", "org.jruby.RubyClass.newInstance(RubyClass.java:939)", "org.jruby.RubyClass$INVOKER$i$newInstance.call(RubyClass$INVOKER$i$newInstance.gen)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:207)", "C_3a_.ELK_Stack.logstash_minus_7_dot_14_dot_0_minus_windows_minus_x86_64.logstash_minus_7_dot_14_dot_0.logstash_minus_core.lib.logstash.pipeline_action.create.RUBY$method$execute$0(C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logstash-core/lib/logstash/pipeline_action/create.rb:52)", "C_3a_.ELK_Stack.logstash_minus_7_dot_14_dot_0_minus_windows_minus_x86_64.logstash_minus_7_dot_14_dot_0.logstash_minus_core.lib.logstash.pipeline_action.create.RUBY$method$execute$0$__VARARGS__(C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logstash-core/lib/logstash/pipeline_action/create.rb)", "org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:80)", "org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:70)", "org.jruby.ir.targets.InvokeSite.invoke(InvokeSite.java:207)", "C_3a_.ELK_Stack.logstash_minus_7_dot_14_dot_0_minus_windows_minus_x86_64.logstash_minus_7_dot_14_dot_0.logstash_minus_core.lib.logstash.agent.RUBY$block$converge_state$2(C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logstash-core/lib/logstash/agent.rb:391)", "org.jruby.runtime.CompiledIRBlockBody.callDirect(CompiledIRBlockBody.java:138)", "org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:58)", "org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:52)", "org.jruby.runtime.Block.call(Block.java:139)", "org.jruby.RubyProc.call(RubyProc.java:318)", "org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:105)", "java.lang.Thread.run(Thread.java:750)"]}
warning: thread "Converge PipelineAction::Create<main>" terminated with exception (report_on_exception is true):
LogStash::Error: Don't know how to handle `Java::JavaLang::IllegalStateException` for `PipelineAction::Create<main>`
create at org/logstash/execution/ConvergeResultExt.java:135
add at org/logstash/execution/ConvergeResultExt.java:60
converge_state at C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logstash-core/lib/logstash/agent.rb:404
[2022-07-06T12:58:44,176][ERROR][logstash.agent ] An exception happened when converging configuration {:exception=>LogStash::Error, :message=>"Don't know how to handle `Java::JavaLang::IllegalStateException` for `PipelineAction::Create<main>`"}
[2022-07-06T12:58:44,182][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<LogStash::Error: Don't know how to handle `Java::JavaLang::IllegalStateException` for `PipelineAction::Create<main>`>, :backtrace=>["org/logstash/execution/ConvergeResultExt.java:135:in `create'", "org/logstash/execution/ConvergeResultExt.java:60:in `add'", "C:/ELK_Stack/logstash-7.14.0-windows-x86_64/logstash-7.14.0/logstash-core/lib/logstash/agent.rb:404:in `block in converge_state'"]}
[2022-07-06T12:58:44,198][FATAL][org.logstash.Logstash ] Logstash stopped processing because of an error: (SystemExit) exit
org.jruby.exceptions.SystemExit: (SystemExit) exit
at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:747) ~[jruby-complete-9.2.19.0.jar:?]
at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:710) ~[jruby-complete-9.2.19.0.jar:?]
at C_3a_.ELK_Stack.logstash_minus_7_dot_14_dot_0_minus_windows_minus_x86_64.logstash_minus_7_dot_14_dot_0.lib.bootstrap.environment.<main>(C:\ELK_Stack\logstash-7.14.0-windows-x86_64\logstash-7.14.0\lib\bootstrap\environment.rb:89) ~[?:?]