diff --git a/api/CHANGELOG.md b/api/CHANGELOG.md
index 35c3e87ad..1cb9acd40 100644
--- a/api/CHANGELOG.md
+++ b/api/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release History: opentelemetry-api
 
+### v1.4.0 / 2024-08-27
+
+* ADDED: Include backtrace first line for better debug info
+
 ### v1.3.0 / 2024-07-24
 
 * ADDED: Add add_link to span api/sdk
diff --git a/api/lib/opentelemetry/version.rb b/api/lib/opentelemetry/version.rb
index 009daf16b..86295b3a9 100644
--- a/api/lib/opentelemetry/version.rb
+++ b/api/lib/opentelemetry/version.rb
@@ -6,5 +6,5 @@
 
 module OpenTelemetry
   ## Current OpenTelemetry version
-  VERSION = '1.3.0'
+  VERSION = '1.4.0'
 end
diff --git a/exporter/otlp-http/lib/opentelemetry/exporter/otlp/http/trace_exporter.rb b/exporter/otlp-http/lib/opentelemetry/exporter/otlp/http/trace_exporter.rb
index e71c1a945..f6f0ecd98 100644
--- a/exporter/otlp-http/lib/opentelemetry/exporter/otlp/http/trace_exporter.rb
+++ b/exporter/otlp-http/lib/opentelemetry/exporter/otlp/http/trace_exporter.rb
@@ -25,8 +25,7 @@ class TraceExporter # rubocop:disable Metrics/ClassLength
           # Default timeouts in seconds.
           KEEP_ALIVE_TIMEOUT = 30
           RETRY_COUNT = 5
-          WRITE_TIMEOUT_SUPPORTED = Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.6')
-          private_constant(:KEEP_ALIVE_TIMEOUT, :RETRY_COUNT, :WRITE_TIMEOUT_SUPPORTED)
+          private_constant(:KEEP_ALIVE_TIMEOUT, :RETRY_COUNT)
 
           ERROR_MESSAGE_INVALID_HEADERS = 'headers must be a String with comma-separated URL Encoded UTF-8 k=v pairs or a Hash'
           private_constant(:ERROR_MESSAGE_INVALID_HEADERS)
@@ -153,7 +152,7 @@ def send_bytes(bytes, timeout:) # rubocop:disable Metrics/MethodLength
 
               @http.open_timeout = remaining_timeout
               @http.read_timeout = remaining_timeout
-              @http.write_timeout = remaining_timeout if WRITE_TIMEOUT_SUPPORTED
+              @http.write_timeout = remaining_timeout
               @http.start unless @http.started?
               response = measure_request_duration { @http.request(request) }
 
@@ -209,7 +208,7 @@ def send_bytes(bytes, timeout:) # rubocop:disable Metrics/MethodLength
             # Reset timeouts to defaults for the next call.
             @http.open_timeout = @timeout
             @http.read_timeout = @timeout
-            @http.write_timeout = @timeout if WRITE_TIMEOUT_SUPPORTED
+            @http.write_timeout = @timeout
           end
 
           def handle_redirect(location)
diff --git a/exporter/otlp-metrics/CHANGELOG.md b/exporter/otlp-metrics/CHANGELOG.md
index 94a2c1972..b42812d56 100644
--- a/exporter/otlp-metrics/CHANGELOG.md
+++ b/exporter/otlp-metrics/CHANGELOG.md
@@ -1 +1,5 @@
 # Release History: opentelemetry-exporter-otlp-metrics
+
+### v0.1.0 / 2024-08-27
+
+Initial release.
diff --git a/exporter/otlp-metrics/opentelemetry-exporter-otlp-metrics.gemspec b/exporter/otlp-metrics/opentelemetry-exporter-otlp-metrics.gemspec
index 571b3b203..0729f3e37 100644
--- a/exporter/otlp-metrics/opentelemetry-exporter-otlp-metrics.gemspec
+++ b/exporter/otlp-metrics/opentelemetry-exporter-otlp-metrics.gemspec
@@ -29,8 +29,8 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'google-protobuf', '>= 3.18', '< 5.0'
   spec.add_dependency 'opentelemetry-api', '~> 1.1'
   spec.add_dependency 'opentelemetry-common', '~> 0.20'
-  spec.add_dependency 'opentelemetry-metrics-api', '~> 0.1.0'
-  spec.add_dependency 'opentelemetry-metrics-sdk', '~> 0.1.0'
+  spec.add_dependency 'opentelemetry-metrics-api', '~> 0.1'
+  spec.add_dependency 'opentelemetry-metrics-sdk', '~> 0.2'
   spec.add_dependency 'opentelemetry-sdk', '~> 1.2'
   spec.add_dependency 'opentelemetry-semantic_conventions'
 
diff --git a/exporter/otlp/CHANGELOG.md b/exporter/otlp/CHANGELOG.md
index 88ee03a7d..bd86c0313 100644
--- a/exporter/otlp/CHANGELOG.md
+++ b/exporter/otlp/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release History: opentelemetry-exporter-otlp
 
+### v0.29.0 / 2024-08-27
+
+* ADDED: Add support for mutual TLS.
+
 ### v0.28.1 / 2024-07-24
 
 * ADDED: Improve SSL error logging.
diff --git a/exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb b/exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb
index 6083692ff..35754f1e9 100644
--- a/exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb
+++ b/exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb
@@ -28,8 +28,7 @@ class Exporter # rubocop:disable Metrics/ClassLength
         # Default timeouts in seconds.
         KEEP_ALIVE_TIMEOUT = 30
         RETRY_COUNT = 5
-        WRITE_TIMEOUT_SUPPORTED = Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.6')
-        private_constant(:KEEP_ALIVE_TIMEOUT, :RETRY_COUNT, :WRITE_TIMEOUT_SUPPORTED)
+        private_constant(:KEEP_ALIVE_TIMEOUT, :RETRY_COUNT)
 
         ERROR_MESSAGE_INVALID_HEADERS = 'headers must be a String with comma-separated URL Encoded UTF-8 k=v pairs or a Hash'
         private_constant(:ERROR_MESSAGE_INVALID_HEADERS)
@@ -153,7 +152,7 @@ def send_bytes(bytes, timeout:) # rubocop:disable Metrics/CyclomaticComplexity,
 
             @http.open_timeout = remaining_timeout
             @http.read_timeout = remaining_timeout
-            @http.write_timeout = remaining_timeout if WRITE_TIMEOUT_SUPPORTED
+            @http.write_timeout = remaining_timeout
             @http.start unless @http.started?
             response = measure_request_duration { @http.request(request) }
 
@@ -213,7 +212,7 @@ def send_bytes(bytes, timeout:) # rubocop:disable Metrics/CyclomaticComplexity,
           # Reset timeouts to defaults for the next call.
           @http.open_timeout = @timeout
           @http.read_timeout = @timeout
-          @http.write_timeout = @timeout if WRITE_TIMEOUT_SUPPORTED
+          @http.write_timeout = @timeout
         end
 
         def handle_redirect(location)
diff --git a/exporter/otlp/lib/opentelemetry/exporter/otlp/version.rb b/exporter/otlp/lib/opentelemetry/exporter/otlp/version.rb
index b12e7e7de..fd3718066 100644
--- a/exporter/otlp/lib/opentelemetry/exporter/otlp/version.rb
+++ b/exporter/otlp/lib/opentelemetry/exporter/otlp/version.rb
@@ -8,7 +8,7 @@ module OpenTelemetry
   module Exporter
     module OTLP
       ## Current OpenTelemetry OTLP exporter version
-      VERSION = '0.28.1'
+      VERSION = '0.29.0'
     end
   end
 end
diff --git a/exporter/zipkin/lib/opentelemetry/exporter/zipkin/exporter.rb b/exporter/zipkin/lib/opentelemetry/exporter/zipkin/exporter.rb
index 43efbee2c..779df0022 100644
--- a/exporter/zipkin/lib/opentelemetry/exporter/zipkin/exporter.rb
+++ b/exporter/zipkin/lib/opentelemetry/exporter/zipkin/exporter.rb
@@ -24,8 +24,7 @@ class Exporter # rubocop:disable Metrics/ClassLength
         # Default timeouts in seconds.
         KEEP_ALIVE_TIMEOUT = 30
         RETRY_COUNT = 5
-        WRITE_TIMEOUT_SUPPORTED = Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.6')
-        private_constant(:KEEP_ALIVE_TIMEOUT, :RETRY_COUNT, :WRITE_TIMEOUT_SUPPORTED)
+        private_constant(:KEEP_ALIVE_TIMEOUT, :RETRY_COUNT)
 
         def initialize(endpoint: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_ZIPKIN_ENDPOINT', default: 'http://localhost:9411/api/v2/spans'),
                        headers: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_ZIPKIN_TRACES_HEADERS', 'OTEL_EXPORTER_ZIPKIN_HEADERS'),
@@ -130,7 +129,7 @@ def send_spans(zipkin_spans, timeout: nil) # rubocop:disable Metrics/MethodLengt
 
             @http.open_timeout = remaining_timeout
             @http.read_timeout = remaining_timeout
-            @http.write_timeout = remaining_timeout if WRITE_TIMEOUT_SUPPORTED
+            @http.write_timeout = remaining_timeout
             @http.start unless @http.started?
 
             response = measure_request_duration { @http.request(request) }
diff --git a/logs_sdk/lib/opentelemetry/sdk/logs/export.rb b/logs_sdk/lib/opentelemetry/sdk/logs/export.rb
index 2565dbf85..414670e86 100644
--- a/logs_sdk/lib/opentelemetry/sdk/logs/export.rb
+++ b/logs_sdk/lib/opentelemetry/sdk/logs/export.rb
@@ -24,6 +24,8 @@ module Export
   end
 end
 
+require_relative 'export/console_log_record_exporter'
+require_relative 'export/in_memory_log_record_exporter'
 require_relative 'export/log_record_exporter'
 require_relative 'export/simple_log_record_processor'
 require_relative 'export/batch_log_record_processor'
diff --git a/logs_sdk/lib/opentelemetry/sdk/logs/export/console_log_record_exporter.rb b/logs_sdk/lib/opentelemetry/sdk/logs/export/console_log_record_exporter.rb
new file mode 100644
index 000000000..9f1af854d
--- /dev/null
+++ b/logs_sdk/lib/opentelemetry/sdk/logs/export/console_log_record_exporter.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+module OpenTelemetry
+  module SDK
+    module Logs
+      module Export
+        # Outputs {LogRecordData} to the console.
+        #
+        # Potentially useful for exploratory purposes.
+        class ConsoleLogRecordExporter
+          def initialize
+            @stopped = false
+          end
+
+          def export(log_records, timeout: nil)
+            return FAILURE if @stopped
+
+            Array(log_records).each { |s| pp s }
+
+            SUCCESS
+          end
+
+          def force_flush(timeout: nil)
+            SUCCESS
+          end
+
+          def shutdown(timeout: nil)
+            @stopped = true
+            SUCCESS
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/logs_sdk/lib/opentelemetry/sdk/logs/export/in_memory_log_record_exporter.rb b/logs_sdk/lib/opentelemetry/sdk/logs/export/in_memory_log_record_exporter.rb
new file mode 100644
index 000000000..10c181e12
--- /dev/null
+++ b/logs_sdk/lib/opentelemetry/sdk/logs/export/in_memory_log_record_exporter.rb
@@ -0,0 +1,104 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+module OpenTelemetry
+  module SDK
+    module Logs
+      module Export
+        # A LogRecordExporter implementation that can be used to test OpenTelemetry integration.
+        #
+        # @example Usage in a test suite:
+        #   class MyClassTest
+        #     def setup
+        #       @logger_provider = LoggerProvider.new
+        #       @exporter = InMemoryLogRecordExporter.new
+        #       @logger_provider.add_log_record_processor(SimpleLogRecordProcessor.new(@exporter))
+        #     end
+        #
+        #     def test_emitted_log_records
+        #       log_record = OpenTelemetry::SDK::Logs::LogRecord.new(body: 'log')
+        #       @logger_provider.logger.on_emit(log_record, context)
+        #
+        #       log_records = @exporter.emitted_log_records
+
+        #       refute_nil(log_records)
+        #       assert_equal(1, log_records.size)
+        #       assert_equal(log_records[0].body, 'log')
+        #     end
+        #   end
+        class InMemoryLogRecordExporter
+          # Returns a new instance of the {InMemoryLogRecordExporter}.
+          #
+          # @return a new instance of the {InMemoryLogRecordExporter}.
+          def initialize
+            @emitted_log_records = []
+            @stopped = false
+            @mutex = Mutex.new
+          end
+
+          # Returns a frozen array of the emitted {LogRecordData}s, represented by
+          # {io.opentelemetry.proto.trace.v1.LogRecord}.
+          #
+          # @return [Array<LogRecordData>] a frozen array of the emitted {LogRecordData}s.
+          def emitted_log_records
+            @mutex.synchronize do
+              @emitted_log_records.clone.freeze
+            end
+          end
+
+          # Clears the internal collection of emitted {LogRecord}s.
+          #
+          # Does not reset the state of this exporter if already shutdown.
+          def reset
+            @mutex.synchronize do
+              @emitted_log_records.clear
+            end
+          end
+
+          # Called to export {LogRecordData}s.
+          #
+          # @param [Enumerable<LogRecordData>] log_record_datas the list of {LogRecordData}s to be
+          #   exported.
+          # @param [optional Numeric] timeout An optional timeout in seconds.
+          # @return [Integer] the result of the export, SUCCESS or
+          #   FAILURE
+          def export(log_record_datas, timeout: nil)
+            @mutex.synchronize do
+              return FAILURE if @stopped
+
+              @emitted_log_records.concat(log_record_datas.to_a)
+            end
+            SUCCESS
+          end
+
+          # Called when {LoggerProvider#force_flush} is called, if this exporter is
+          # registered to a {LoggerProvider} object.
+          #
+          # @param [optional Numeric] timeout An optional timeout in seconds.
+          # @return [Integer] SUCCESS if no error occurred, FAILURE if a
+          #   non-specific failure occurred, TIMEOUT if a timeout occurred.
+          def force_flush(timeout: nil)
+            SUCCESS
+          end
+
+          # Called when {LoggerProvider#shutdown} is called, if this exporter is
+          # registered to a {LoggerProvider} object.
+          #
+          # @param [optional Numeric] timeout An optional timeout in seconds.
+          # @return [Integer] SUCCESS if no error occurred, FAILURE if a
+          #   non-specific failure occurred, TIMEOUT if a timeout occurred.
+          def shutdown(timeout: nil)
+            @mutex.synchronize do
+              @emitted_log_records.clear
+              @stopped = true
+            end
+            SUCCESS
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/logs_sdk/test/opentelemetry/sdk/logs/export/console_log_record_exporter_test.rb b/logs_sdk/test/opentelemetry/sdk/logs/export/console_log_record_exporter_test.rb
new file mode 100644
index 000000000..b549bc944
--- /dev/null
+++ b/logs_sdk/test/opentelemetry/sdk/logs/export/console_log_record_exporter_test.rb
@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require 'test_helper'
+
+describe OpenTelemetry::SDK::Logs::Export::ConsoleLogRecordExporter do
+  export = OpenTelemetry::SDK::Logs::Export
+
+  let(:captured_stdout)  { StringIO.new }
+  let(:log_record_data1) { Logs::LogRecordData.new }
+  let(:log_record_data2) { Logs::LogRecordData.new }
+  let(:log_records)      { [log_record_data1, log_record_data2] }
+  let(:exporter)         { export::ConsoleLogRecordExporter.new }
+
+  before do
+    @original_stdout = $stdout
+    $stdout = captured_stdout
+  end
+
+  after do
+    $stdout = @original_stdout
+  end
+
+  it 'accepts an Array of LogRecordData as arg to #export and succeeds' do
+    assert_equal(export::SUCCESS, exporter.export(log_records))
+  end
+
+  it 'accepts an Enumerable of LogRecordData as arg to #export and succeeds' do
+    enumerable = Struct.new(:log_record0, :log_record1).new(log_records[0], log_records[1])
+
+    assert_equal(export::SUCCESS, exporter.export(enumerable))
+  end
+
+  it 'outputs to console (stdout)' do
+    exporter.export(log_records)
+
+    assert_match(/#<struct OpenTelemetry::SDK::Logs::LogRecordData/, captured_stdout.string)
+  end
+
+  it 'accepts calls to #force_flush' do
+    exporter.force_flush
+  end
+
+  it 'accepts calls to #shutdown' do
+    exporter.shutdown
+  end
+
+  it 'fails to export after shutdown' do
+    exporter.shutdown
+
+    assert_equal(export::FAILURE, exporter.export(log_records))
+  end
+end
diff --git a/logs_sdk/test/opentelemetry/sdk/logs/export/in_memory_log_record_exporter_test.rb b/logs_sdk/test/opentelemetry/sdk/logs/export/in_memory_log_record_exporter_test.rb
new file mode 100644
index 000000000..473674355
--- /dev/null
+++ b/logs_sdk/test/opentelemetry/sdk/logs/export/in_memory_log_record_exporter_test.rb
@@ -0,0 +1,93 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require 'test_helper'
+
+describe OpenTelemetry::SDK::Logs::Export::InMemoryLogRecordExporter do
+  export = OpenTelemetry::SDK::Logs::Export
+
+  let(:log_record_data1) { OpenTelemetry::SDK::Logs::LogRecordData.new }
+  let(:log_record_data2) { OpenTelemetry::SDK::Logs::LogRecordData.new }
+  let(:exporter)         { export::InMemoryLogRecordExporter.new }
+
+  it 'accepts an Array of LogRecordDatas as argument to #export' do
+    exporter.export([log_record_data1, log_record_data2])
+
+    emitted_log_records = exporter.emitted_log_records
+
+    assert_equal(log_record_data1, emitted_log_records[0])
+    assert_equal(log_record_data2, emitted_log_records[1])
+  end
+
+  it 'accepts an Enumerable of LogRecordDatas as argument to #export' do
+    # An anonymous Struct serves as a handy implementor of Enumerable
+    enumerable = Struct.new(:log_record_data1, :log_record_data2).new
+    enumerable.log_record_data1 = log_record_data1
+    enumerable.log_record_data2 = log_record_data2
+
+    exporter.export(enumerable)
+
+    emitted_log_records = exporter.emitted_log_records
+
+    assert_equal(log_record_data1, emitted_log_records[0])
+    assert_equal(log_record_data2, emitted_log_records[1])
+  end
+
+  it 'freezes the return of #emitted_log_records' do
+    exporter.export([log_record_data1])
+
+    assert_predicate(exporter.emitted_log_records, :frozen?)
+  end
+
+  it 'allows additional calls to #export after #emitted_log_records' do
+    exporter.export([log_record_data1])
+    emitted_log_records1 = exporter.emitted_log_records
+
+    exporter.export([log_record_data2])
+    emitted_log_records2 = exporter.emitted_log_records
+
+    assert_equal(1, emitted_log_records1.length)
+    assert_equal(2, emitted_log_records2.length)
+
+    assert_equal(emitted_log_records2[0], emitted_log_records1[0])
+  end
+
+  it 'returns success from #export' do
+    assert_equal(export::SUCCESS, exporter.export([log_record_data1]))
+  end
+
+  it 'returns success from #force_flush' do
+    assert_equal(export::SUCCESS, exporter.force_flush)
+  end
+
+  it 'returns error from #export after #shutdown called' do
+    exporter.export([log_record_data1])
+    exporter.shutdown
+
+    assert_equal(export::FAILURE, exporter.export([log_record_data2]))
+  end
+
+  it 'returns an empty array from #export after #shutdown called' do
+    exporter.export([log_record_data1])
+    exporter.shutdown
+
+    assert_equal(0, exporter.emitted_log_records.length)
+  end
+
+  it 'records nothing if stopped' do
+    exporter.instance_variable_set(:@stopped, true)
+    exporter.export([log_record_data1])
+
+    assert_equal(0, exporter.emitted_log_records.length)
+  end
+
+  it 'clears the emitted log records on #reset' do
+    exporter.instance_variable_set(:@emitted_log_records, [log_record_data1])
+    exporter.reset
+
+    assert_empty(exporter.instance_variable_get(:@emitted_log_records))
+  end
+end
diff --git a/metrics_sdk/CHANGELOG.md b/metrics_sdk/CHANGELOG.md
index a1385c5c6..1328411e2 100644
--- a/metrics_sdk/CHANGELOG.md
+++ b/metrics_sdk/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release History: opentelemetry-metrics-sdk
 
+### v0.2.0 / 2024-08-27
+
+* ADDED: Add basic periodic exporting metric_reader
+
 ### v0.1.0 / 2024-07-31
 
 Initial release.
diff --git a/metrics_sdk/lib/opentelemetry/sdk/metrics/version.rb b/metrics_sdk/lib/opentelemetry/sdk/metrics/version.rb
index 41bd724c7..4016895fb 100644
--- a/metrics_sdk/lib/opentelemetry/sdk/metrics/version.rb
+++ b/metrics_sdk/lib/opentelemetry/sdk/metrics/version.rb
@@ -8,7 +8,7 @@ module OpenTelemetry
   module SDK
     module Metrics
       # Current OpenTelemetry metrics sdk version
-      VERSION = '0.1.0'
+      VERSION = '0.2.0'
     end
   end
 end