build(deps): bump github.com/uber/jaeger-client-go

Bumps [github.com/uber/jaeger-client-go](https://github.com/uber/jaeger-client-go) from 2.20.0+incompatible to 2.20.1+incompatible.
- [Release notes](https://github.com/uber/jaeger-client-go/releases)
- [Changelog](https://github.com/jaegertracing/jaeger-client-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/uber/jaeger-client-go/compare/v2.20.0...v2.20.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

9 files changed, 71 insertions, 35 deletions

diff --git a/go.mod b/go.mod
index 1b4e58225..158637781 100644
--- a/go.mod
+++ b/go.mod
@@ -60,7 +60,7 @@ require (
 	github.com/stretchr/testify v1.4.0
 	github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2
 	github.com/uber-go/atomic v1.4.0 // indirect
-	github.com/uber/jaeger-client-go v2.20.0+incompatible
+	github.com/uber/jaeger-client-go v2.20.1+incompatible
 	github.com/uber/jaeger-lib v0.0.0-20190122222657-d036253de8f5 // indirect
 	github.com/varlink/go v0.0.0-20190502142041-0f1d566d194b
 	github.com/vishvananda/netlink v1.0.0
diff --git a/go.sum b/go.sum
index 262cc86a0..72542d015 100644
--- a/go.sum
+++ b/go.sum
@@ -411,6 +411,8 @@ github.com/uber/jaeger-client-go v2.19.0+incompatible h1:pbwbYfHUoaase0oPQOdZ1Gc
 github.com/uber/jaeger-client-go v2.19.0+incompatible/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
 github.com/uber/jaeger-client-go v2.20.0+incompatible h1:ttG9wKdl2ikV/BGOtu+eb+VPp+R7jMeuM177Ihs5Fdc=
 github.com/uber/jaeger-client-go v2.20.0+incompatible/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
+github.com/uber/jaeger-client-go v2.20.1+incompatible h1:HgqpYBng0n7tLJIlyT4kPCIv5XgCsF+kai1NnnrJzEU=
+github.com/uber/jaeger-client-go v2.20.1+incompatible/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
 github.com/uber/jaeger-lib v0.0.0-20190122222657-d036253de8f5 h1:CwmGyzHTzCqCdZJkWR0A7ucZXgrCY7spRcpvm7ci//s=
 github.com/uber/jaeger-lib v0.0.0-20190122222657-d036253de8f5/go.mod h1:ComeNDZlWwrWnDv8aPp0Ba6+uUTzImX/AauajbLI56U=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
diff --git a/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
index c4590bf93..5e7e9d5e5 100644
--- a/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
+++ b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
@@ -1,6 +1,16 @@
 Changes by Version
 ==================
 
+2.20.1 (2019-11-08)
+-------------------
+
+Minor patch via https://github.com/jaegertracing/jaeger-client-go/pull/468
+
+- Make `AdaptiveSamplerUpdater` usable with default values; Resolves #467
+- Create `OperationNameLateBinding` sampler option and config option
+- Make `SamplerOptions` var of public type, so that its functions are discoverable via godoc
+
+
 2.20.0 (2019-11-06)
 -------------------
 
diff --git a/vendor/github.com/uber/jaeger-client-go/config/config.go b/vendor/github.com/uber/jaeger-client-go/config/config.go
index 965f7c3ee..a0c32d804 100644
--- a/vendor/github.com/uber/jaeger-client-go/config/config.go
+++ b/vendor/github.com/uber/jaeger-client-go/config/config.go
@@ -76,17 +76,26 @@ type SamplerConfig struct {
 	// Can be set by exporting an environment variable named JAEGER_SAMPLER_MANAGER_HOST_PORT
 	SamplingServerURL string `yaml:"samplingServerURL"`
 
-	// MaxOperations is the maximum number of operations that the sampler
-	// will keep track of. If an operation is not tracked, a default probabilistic
-	// sampler will be used rather than the per operation specific sampler.
-	// Can be set by exporting an environment variable named JAEGER_SAMPLER_MAX_OPERATIONS
-	MaxOperations int `yaml:"maxOperations"`
-
 	// SamplingRefreshInterval controls how often the remotely controlled sampler will poll
 	// jaeger-agent for the appropriate sampling strategy.
 	// Can be set by exporting an environment variable named JAEGER_SAMPLER_REFRESH_INTERVAL
 	SamplingRefreshInterval time.Duration `yaml:"samplingRefreshInterval"`
 
+	// MaxOperations is the maximum number of operations that the PerOperationSampler
+	// will keep track of. If an operation is not tracked, a default probabilistic
+	// sampler will be used rather than the per operation specific sampler.
+	// Can be set by exporting an environment variable named JAEGER_SAMPLER_MAX_OPERATIONS.
+	MaxOperations int `yaml:"maxOperations"`
+
+	// Opt-in feature for applications that require late binding of span name via explicit
+	// call to SetOperationName when using PerOperationSampler. When this feature is enabled,
+	// the sampler will return retryable=true from OnCreateSpan(), thus leaving the sampling
+	// decision as non-final (and the span as writeable). This may lead to degraded performance
+	// in applications that always provide the correct span name on trace creation.
+	//
+	// For backwards compatibility this option is off by default.
+	OperationNameLateBinding bool `yaml:"operationNameLateBinding"`
+
 	// Options can be used to programmatically pass additional options to the Remote sampler.
 	Options []jaeger.SamplerOption
 }
@@ -335,7 +344,7 @@ func (sc *SamplerConfig) NewSampler(
 			return jaeger.NewProbabilisticSampler(sc.Param)
 		}
 		return nil, fmt.Errorf(
-			"Invalid Param for probabilistic sampler: %v. Expecting value between 0 and 1",
+			"invalid Param for probabilistic sampler; expecting value between 0 and 1, received %v",
 			sc.Param,
 		)
 	}
@@ -353,17 +362,14 @@ func (sc *SamplerConfig) NewSampler(
 			jaeger.SamplerOptions.Metrics(metrics),
 			jaeger.SamplerOptions.InitialSampler(initSampler),
 			jaeger.SamplerOptions.SamplingServerURL(sc.SamplingServerURL),
-		}
-		if sc.MaxOperations != 0 {
-			options = append(options, jaeger.SamplerOptions.MaxOperations(sc.MaxOperations))
-		}
-		if sc.SamplingRefreshInterval != 0 {
-			options = append(options, jaeger.SamplerOptions.SamplingRefreshInterval(sc.SamplingRefreshInterval))
+			jaeger.SamplerOptions.MaxOperations(sc.MaxOperations),
+			jaeger.SamplerOptions.OperationNameLateBinding(sc.OperationNameLateBinding),
+			jaeger.SamplerOptions.SamplingRefreshInterval(sc.SamplingRefreshInterval),
 		}
 		options = append(options, sc.Options...)
 		return jaeger.NewRemotelyControlledSampler(serviceName, options...), nil
 	}
-	return nil, fmt.Errorf("Unknown sampler type %v", sc.Type)
+	return nil, fmt.Errorf("unknown sampler type (%s)", sc.Type)
 }
 
 // NewReporter instantiates a new reporter that submits spans to the collector
diff --git a/vendor/github.com/uber/jaeger-client-go/constants.go b/vendor/github.com/uber/jaeger-client-go/constants.go
index 0da47b02f..5d27b628d 100644
--- a/vendor/github.com/uber/jaeger-client-go/constants.go
+++ b/vendor/github.com/uber/jaeger-client-go/constants.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// JaegerClientVersion is the version of the client library reported as Span tag.
-	JaegerClientVersion = "Go-2.20.0"
+	JaegerClientVersion = "Go-2.20.1"
 
 	// JaegerClientVersionTagKey is the name of the tag used to report client version.
 	JaegerClientVersionTagKey = "jaeger.version"
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler.go b/vendor/github.com/uber/jaeger-client-go/sampler.go
index 6195d59c5..f47004b1f 100644
--- a/vendor/github.com/uber/jaeger-client-go/sampler.go
+++ b/vendor/github.com/uber/jaeger-client-go/sampler.go
@@ -363,6 +363,9 @@ type PerOperationSamplerParams struct {
 
 // NewPerOperationSampler returns a new PerOperationSampler.
 func NewPerOperationSampler(params PerOperationSamplerParams) *PerOperationSampler {
+	if params.MaxOperations <= 0 {
+		params.MaxOperations = defaultMaxOperations
+	}
 	samplers := make(map[string]*GuaranteedThroughputProbabilisticSampler)
 	for _, strategy := range params.Strategies.PerOperationStrategies {
 		sampler := newGuaranteedThroughputProbabilisticSampler(
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler_remote.go b/vendor/github.com/uber/jaeger-client-go/sampler_remote.go
index 9bd0c9822..4448b8f64 100644
--- a/vendor/github.com/uber/jaeger-client-go/sampler_remote.go
+++ b/vendor/github.com/uber/jaeger-client-go/sampler_remote.go
@@ -258,8 +258,9 @@ func (u *RateLimitingSamplerUpdater) Update(sampler SamplerV2, strategy interfac
 // -----------------------
 
 // AdaptiveSamplerUpdater is used by RemotelyControlledSampler to parse sampling configuration.
+// Fields have the same meaning as in PerOperationSamplerParams.
 type AdaptiveSamplerUpdater struct {
-	MaxOperations            int // required
+	MaxOperations            int
 	OperationNameLateBinding bool
 }
 
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go b/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go
index 7a292effc..3b5c6aa9c 100644
--- a/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go
+++ b/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go
@@ -23,12 +23,17 @@ import (
 // SamplerOption is a function that sets some option on the sampler
 type SamplerOption func(options *samplerOptions)
 
-// SamplerOptions is a factory for all available SamplerOption's
-var SamplerOptions samplerOptions
+// SamplerOptions is a factory for all available SamplerOption's.
+var SamplerOptions SamplerOptionsFactory
+
+// SamplerOptionsFactory is a factory for all available SamplerOption's.
+// The type acts as a namespace for factory functions. It is public to
+// make the functions discoverable via godoc. Recommended to be used
+// via global SamplerOptions variable.
+type SamplerOptionsFactory struct{}
 
 type samplerOptions struct {
 	metrics                 *Metrics
-	maxOperations           int
 	sampler                 SamplerV2
 	logger                  Logger
 	samplingServerURL       string
@@ -36,11 +41,12 @@ type samplerOptions struct {
 	samplingFetcher         SamplingStrategyFetcher
 	samplingParser          SamplingStrategyParser
 	updaters                []SamplerUpdater
+	posParams               PerOperationSamplerParams
 }
 
 // Metrics creates a SamplerOption that initializes Metrics on the sampler,
 // which is used to emit statistics.
-func (samplerOptions) Metrics(m *Metrics) SamplerOption {
+func (SamplerOptionsFactory) Metrics(m *Metrics) SamplerOption {
 	return func(o *samplerOptions) {
 		o.metrics = m
 	}
@@ -48,22 +54,30 @@ func (samplerOptions) Metrics(m *Metrics) SamplerOption {
 
 // MaxOperations creates a SamplerOption that sets the maximum number of
 // operations the sampler will keep track of.
-func (samplerOptions) MaxOperations(maxOperations int) SamplerOption {
+func (SamplerOptionsFactory) MaxOperations(maxOperations int) SamplerOption {
+	return func(o *samplerOptions) {
+		o.posParams.MaxOperations = maxOperations
+	}
+}
+
+// OperationNameLateBinding creates a SamplerOption that sets the respective
+// field in the PerOperationSamplerParams.
+func (SamplerOptionsFactory) OperationNameLateBinding(enable bool) SamplerOption {
 	return func(o *samplerOptions) {
-		o.maxOperations = maxOperations
+		o.posParams.OperationNameLateBinding = enable
 	}
 }
 
 // InitialSampler creates a SamplerOption that sets the initial sampler
 // to use before a remote sampler is created and used.
-func (samplerOptions) InitialSampler(sampler Sampler) SamplerOption {
+func (SamplerOptionsFactory) InitialSampler(sampler Sampler) SamplerOption {
 	return func(o *samplerOptions) {
 		o.sampler = samplerV1toV2(sampler)
 	}
 }
 
 // Logger creates a SamplerOption that sets the logger used by the sampler.
-func (samplerOptions) Logger(logger Logger) SamplerOption {
+func (SamplerOptionsFactory) Logger(logger Logger) SamplerOption {
 	return func(o *samplerOptions) {
 		o.logger = logger
 	}
@@ -71,7 +85,7 @@ func (samplerOptions) Logger(logger Logger) SamplerOption {
 
 // SamplingServerURL creates a SamplerOption that sets the sampling server url
 // of the local agent that contains the sampling strategies.
-func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption {
+func (SamplerOptionsFactory) SamplingServerURL(samplingServerURL string) SamplerOption {
 	return func(o *samplerOptions) {
 		o.samplingServerURL = samplingServerURL
 	}
@@ -79,28 +93,28 @@ func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption
 
 // SamplingRefreshInterval creates a SamplerOption that sets how often the
 // sampler will poll local agent for the appropriate sampling strategy.
-func (samplerOptions) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
+func (SamplerOptionsFactory) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
 	return func(o *samplerOptions) {
 		o.samplingRefreshInterval = samplingRefreshInterval
 	}
 }
 
 // SamplingStrategyFetcher creates a SamplerOption that initializes sampling strategy fetcher.
-func (samplerOptions) SamplingStrategyFetcher(fetcher SamplingStrategyFetcher) SamplerOption {
+func (SamplerOptionsFactory) SamplingStrategyFetcher(fetcher SamplingStrategyFetcher) SamplerOption {
 	return func(o *samplerOptions) {
 		o.samplingFetcher = fetcher
 	}
 }
 
 // SamplingStrategyParser creates a SamplerOption that initializes sampling strategy parser.
-func (samplerOptions) SamplingStrategyParser(parser SamplingStrategyParser) SamplerOption {
+func (SamplerOptionsFactory) SamplingStrategyParser(parser SamplingStrategyParser) SamplerOption {
 	return func(o *samplerOptions) {
 		o.samplingParser = parser
 	}
 }
 
 // Updaters creates a SamplerOption that initializes sampler updaters.
-func (samplerOptions) Updaters(updaters ...SamplerUpdater) SamplerOption {
+func (SamplerOptionsFactory) Updaters(updaters ...SamplerUpdater) SamplerOption {
 	return func(o *samplerOptions) {
 		o.updaters = updaters
 	}
@@ -116,9 +130,6 @@ func (o *samplerOptions) applyOptionsAndDefaults(opts ...SamplerOption) *sampler
 	if o.logger == nil {
 		o.logger = log.NullLogger
 	}
-	if o.maxOperations <= 0 {
-		o.maxOperations = defaultMaxOperations
-	}
 	if o.samplingServerURL == "" {
 		o.samplingServerURL = DefaultSamplingServerURL
 	}
@@ -139,7 +150,10 @@ func (o *samplerOptions) applyOptionsAndDefaults(opts ...SamplerOption) *sampler
 	}
 	if o.updaters == nil {
 		o.updaters = []SamplerUpdater{
-			&AdaptiveSamplerUpdater{MaxOperations: o.maxOperations},
+			&AdaptiveSamplerUpdater{
+				MaxOperations:            o.posParams.MaxOperations,
+				OperationNameLateBinding: o.posParams.OperationNameLateBinding,
+			},
 			new(ProbabilisticSamplerUpdater),
 			new(RateLimitingSamplerUpdater),
 		}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 71c50d78d..0bd02f836 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -443,7 +443,7 @@ github.com/stretchr/testify/require
 github.com/syndtr/gocapability/capability
 # github.com/tchap/go-patricia v2.3.0+incompatible
 github.com/tchap/go-patricia/patricia
-# github.com/uber/jaeger-client-go v2.20.0+incompatible
+# github.com/uber/jaeger-client-go v2.20.1+incompatible
 github.com/uber/jaeger-client-go
 github.com/uber/jaeger-client-go/config
 github.com/uber/jaeger-client-go/internal/baggage