diff --git a/.ci/Dockerfile b/.ci/Dockerfile
new file mode 100644
index 0000000..9ccbde9
--- /dev/null
+++ b/.ci/Dockerfile
@@ -0,0 +1,27 @@
+ARG ELASTIC_STACK_VERSION
+ARG DISTRIBUTION_SUFFIX
+FROM docker.elastic.co/logstash/logstash${DISTRIBUTION_SUFFIX}:${ELASTIC_STACK_VERSION}
+USER root
+RUN localedef -i en_US -f UTF-8 en_US.UTF-8
+RUN locale -a
+USER logstash
+
+COPY --chown=logstash:logstash Gemfile /usr/share/plugins/plugin/Gemfile
+COPY --chown=logstash:logstash *.gemspec VERSION* version* /usr/share/plugins/plugin/
+RUN cp /usr/share/logstash/logstash-core/versions-gem-copy.yml /usr/share/logstash/versions.yml
+# NOTE: since 8.0 JDK is bundled as part of the LS distribution under $LS_HOME/jdk
+ENV PATH="${PATH}:/usr/share/logstash/vendor/jruby/bin:/usr/share/logstash/jdk/bin"
+ENV LOGSTASH_SOURCE="1"
+ENV ELASTIC_STACK_VERSION=$ELASTIC_STACK_VERSION
+# DISTRIBUTION="default" (by default) or "oss"
+ARG DISTRIBUTION
+ENV DISTRIBUTION=$DISTRIBUTION
+# INTEGRATION="true" while integration testing (false-y by default)
+ARG INTEGRATION
+ENV INTEGRATION=$INTEGRATION
+RUN gem install bundler -v '< 2'
+WORKDIR /usr/share/plugins/plugin
+RUN bundle install --with test ci
+COPY --chown=logstash:logstash . /usr/share/plugins/plugin
+RUN bundle exec rake vendor
+RUN .ci/setup.sh
diff --git a/.travis.yml b/.travis.yml
index a50fc73..9d01d1c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,2 +1,19 @@
 import:
-- logstash-plugins/.ci:travis/travis.yml@1.x
\ No newline at end of file
+- logstash-plugins/.ci:travis/travis.yml@1.x
+
+before_install:
+  - sudo apt-get install jq
+  - sudo apt-get install libseccomp-dev
+  - sudo locale-gen en_US.UTF-8
+  - sudo dpkg-reconfigure locales
+arch:
+  - arm64
+  - amd64
+
+virt: vm
+
+env:
+  jobs:
+    - ELASTIC_STACK_VERSION=7.x
+    - SNAPSHOT=true ELASTIC_STACK_VERSION=8.0.0-SNAPSHOT
+    - SNAPSHOT=true ELASTIC_STACK_VERSION=7.11.0-SNAPSHOT
diff --git a/lib/filewatch/helper.rb b/lib/filewatch/helper.rb
index 5da8c0f..66fa844 100644
--- a/lib/filewatch/helper.rb
+++ b/lib/filewatch/helper.rb
@@ -3,8 +3,10 @@
 # https://raw.githubusercontent.com/rails/rails/v4.2.1/activesupport/lib/active_support/core_ext/file/atomic.rb
 # change method name to avoid borking active_support and vice versa
 require 'fileutils'
+require "logstash/util/loggable"
 
 module FileHelper
+  include LogStash::Util::Loggable
   extend self
   # Write to a file atomically. Useful for situations where you don't
   # want other processes or threads to see half-written files.
@@ -38,8 +40,13 @@ def write_atomically(file_name)
     return return_val if old_stat.nil?
 
     # Set correct uid/gid on new file
-    File.chown(old_stat.uid, old_stat.gid, file_name) if old_stat
-
+    if old_stat
+      begin
+        File.chown(old_stat.uid, old_stat.gid, file_name)
+      rescue Errno::EPERM => e
+        logger.error("sincedb_write: #{file_name} error:", :old_stat => old_stat, :exception => e.class, :message => e.message)
+      end
+    end
     return_val
   end
 
diff --git a/spec/inputs/file_read_spec.rb b/spec/inputs/file_read_spec.rb
index d1533bd..5c21030 100644
--- a/spec/inputs/file_read_spec.rb
+++ b/spec/inputs/file_read_spec.rb
@@ -338,10 +338,11 @@
       sincedb_content = File.read(sincedb_path).strip
       expect( sincedb_content ).to_not be_empty
 
-      Stud.try(3.times) do
+      Stud.try(10.times, RSpec::Expectations::ExpectationNotMetError) do
         sleep(1.5) # > sincedb_clean_after
 
         sincedb_content = File.read(sincedb_path).strip
+        puts "sincedb content is #{sincedb_content}"
         expect( sincedb_content ).to be_empty
       end
     end
diff --git a/spec/inputs/file_tail_spec.rb b/spec/inputs/file_tail_spec.rb
index 7aefc69..4af7cd2 100644
--- a/spec/inputs/file_tail_spec.rb
+++ b/spec/inputs/file_tail_spec.rb
@@ -201,7 +201,10 @@
     let(:conf)         { Hash.new }
     let(:mlconf)       { Hash.new }
     let(:events)       { Array.new }
-    let(:mlcodec)      { LogStash::Codecs::Multiline.new(mlconf) }
+    let(:mlcodec)      {
+      puts " The value of mlconf is #{mlconf}"
+      LogStash::Codecs::Multiline.new(mlconf)
+    }
     let(:tracer_codec) { FileInput::CodecTracer.new }
     let(:tmpdir_path)  { Stud::Temporary.directory }
     let(:tmpfile_path) { ::File.join(tmpdir_path, "#{suffix}.txt") }
@@ -222,7 +225,7 @@
           fd.puts("ignore me 2")
           fd.fsync
         end
-        mlconf.update("pattern" => "^\s", "what" => "previous")
+        mlconf.update("pattern" => "^\\s", "what" => "previous")
         conf.update("type" => "blah",
               "path" => path_path,
               "sincedb_path" => sincedb_path,
@@ -341,7 +344,7 @@
       let(:suffix)       { "J" }
       let(:tmpfile_path2) { ::File.join(tmpdir_path, "K.txt") }
       before do
-        mlconf.update("pattern" => "^\s", "what" => "previous")
+        mlconf.update("pattern" => "^\\s", "what" => "previous")
         conf.update(
               "type" => "blah",
               "path" => path_path,