# Ruby error found during Logstash start with IBM Semeru Java

**URL:** <https://discuss.elastic.co/t/ruby-error-found-during-logstash-start-with-ibm-semeru-java/334431>\
**Category:** Logstash\
**Created:** [May 26, 2023, 12:30pm UTC](https://discuss.elastic.co/t/ruby-error-found-during-logstash-start-with-ibm-semeru-java/334431 "2023-05-26T12:30:48Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![KevinT1](https://avatars.discourse-cdn.com/v4/letter/k/ee59a6/32.png) [@KevinT1](https://discuss.elastic.co/u/KevinT1)\
**Post date:** [May 26, 2023, 12:30pm UTC](https://discuss.elastic.co/t/ruby-error-found-during-logstash-start-with-ibm-semeru-java/334431/1 "2023-05-26T12:30:48Z")

</div>

Logstash version: logstash-8.7.1  
JDK:

```auto
> $ ./java -version
> java version "11.0.18" 2023-01-17
> IBM Semeru Runtime Certified Edition 11.0.18.0 (build 11.0.18+10)
> Eclipse OpenJ9 VM 11.0.18.0 (build openj9-0.36.1, JRE 11 Linux amd64-64-Bit Compressed References 20230213_536 (JIT enabled, AOT enabled)
> OpenJ9 - 0592661e4
> OMR - f491bbf6f
> JCL - 90e1a4e204 based on jdk-11.0.18+10)

```

Encounter this error during Logstash 8.7.1 start-up when use with IBM Semeru Java 11.  
May I ask if there is a workaround to this issue.

```auto
> [2023-05-18T02:13:09,814][TRACE][org.logstash.instrument.metrics.BaseFlowMetric] FlowMetric(queue_backpressure) baseline -> FlowCapture{nanoTimestamp=3435946508164793 numerator=0.0 denominator=59.093696}
> [2023-05-18T02:13:09,816][TRACE][org.logstash.instrument.metrics.BaseFlowMetric] FlowMetric(worker_concurrency) baseline -> FlowCapture{nanoTimestamp=3435946510243809 numerator=0.0 denominator=61.174872}
> [2023-05-18T02:13:09,889][FATAL][org.logstash.Logstash] Logstash stopped processing because of an error: (SyntaxError) /home/user1/Logstash/logstash- 8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable.rb:227: syntax error, unexpected tSTRING_BEG
> ::Kernel.warn "CSV#pos= at /home/user1/Logsta...
> ^
> org.jruby.exceptions.SyntaxError: (SyntaxError) /home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable.rb:227: syntax error, unexpected tSTRING_BEG
> ::Kernel.warn "CSV#pos= at /home/user1/Logsta...
> ^
> at org.jruby.RubyKernel.eval(org/jruby/RubyKernel.java:1091) ~[jruby.jar:?]
> at home.user1.Logstash.logstash_minus_8_dot_7_dot_1.vendor.jruby.lib.ruby.stdlib.forwardable.impl._compile_method(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable/impl.rb:22) ~[?:?]
> at home.user1.Logstash.logstash_minus_8_dot_7_dot_1.vendor.jruby.lib.ruby.stdlib.forwardable._delegator_method(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable.rb:218) ~[?:?]
> at home.user1.Logstash.logstash_minus_8_dot_7_dot_1.vendor.jruby.lib.ruby.stdlib.forwardable.def_instance_delegator(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable.rb:182) ~[?:?]
> at home.user1.Logstash.logstash_minus_8_dot_7_dot_1.vendor.jruby.lib.ruby.stdlib.forwardable.def_instance_delegators(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable.rb:158) ~[?:?]
> at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1865) ~[jruby.jar:?]
> at RUBY.def_instance_delegators(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/forwardable.rb:157) ~[?:?]
> at RUBY.<class:CSV>(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/csv.rb:2253) ~[?:?]
> at RUBY.<main>(/home/user1/Logstash/logstash-8.7.1/vendor/jruby/lib/ruby/stdlib/csv.rb:845) ~[?:?]

```

---

<div class="post-metadata">

**Author:** ![leandrojmp](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/leandrojmp/32/107231_2.png) [@leandrojmp](https://discuss.elastic.co/u/leandrojmp)\
**Post date:** [May 26, 2023, 12:35pm UTC](https://discuss.elastic.co/t/ruby-error-found-during-logstash-start-with-ibm-semeru-java/334431/2 "2023-05-26T12:35:53Z")

</div>

> [@KevinT1](#):
>
> Encounter this error during Logstash 8.7.1 start-up when use with IBM Semeru Java 11.

This JVM is not listed on the [compatibility matrix](https://www.elastic.co/support/matrix#matrix_jvm), so this may be the issue.

> [@KevinT1](#):
>
> May I ask if there is a workaround to this issue.

You may use the bundled JVM in Logstash or use a compatible JVM as listed in the compatibility matrix.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 23, 2023, 12:36pm UTC](https://discuss.elastic.co/t/ruby-error-found-during-logstash-start-with-ibm-semeru-java/334431/3 "2023-06-23T12:36:52Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.