diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
index 412a482..d1a8154 100644
--- a/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
@@ -22,8 +22,10 @@
 import (
 	"bufio"
 	"bytes"
+	"context"
 	"encoding/base64"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"math"
@@ -33,12 +35,13 @@
 type _ParseContext int
 
 const (
-	_CONTEXT_IN_TOPLEVEL          _ParseContext = 1
-	_CONTEXT_IN_LIST_FIRST        _ParseContext = 2
-	_CONTEXT_IN_LIST              _ParseContext = 3
-	_CONTEXT_IN_OBJECT_FIRST      _ParseContext = 4
-	_CONTEXT_IN_OBJECT_NEXT_KEY   _ParseContext = 5
-	_CONTEXT_IN_OBJECT_NEXT_VALUE _ParseContext = 6
+	_CONTEXT_INVALID              _ParseContext = iota
+	_CONTEXT_IN_TOPLEVEL                        // 1
+	_CONTEXT_IN_LIST_FIRST                      // 2
+	_CONTEXT_IN_LIST                            // 3
+	_CONTEXT_IN_OBJECT_FIRST                    // 4
+	_CONTEXT_IN_OBJECT_NEXT_KEY                 // 5
+	_CONTEXT_IN_OBJECT_NEXT_VALUE               // 6
 )
 
 func (p _ParseContext) String() string {
@@ -59,7 +62,33 @@
 	return "UNKNOWN-PARSE-CONTEXT"
 }
 
-// JSON protocol implementation for thrift.
+type jsonContextStack []_ParseContext
+
+func (s *jsonContextStack) push(v _ParseContext) {
+	*s = append(*s, v)
+}
+
+func (s jsonContextStack) peek() (v _ParseContext, ok bool) {
+	l := len(s)
+	if l <= 0 {
+		return
+	}
+	return s[l-1], true
+}
+
+func (s *jsonContextStack) pop() (v _ParseContext, ok bool) {
+	l := len(*s)
+	if l <= 0 {
+		return
+	}
+	v = (*s)[l-1]
+	*s = (*s)[0 : l-1]
+	return v, true
+}
+
+var errEmptyJSONContextStack = NewTProtocolExceptionWithType(INVALID_DATA, errors.New("Unexpected empty json protocol context stack"))
+
+// Simple JSON protocol implementation for thrift.
 //
 // This protocol produces/consumes a simple output format
 // suitable for parsing by scripting languages.  It should not be
@@ -68,8 +97,8 @@
 type TSimpleJSONProtocol struct {
 	trans TTransport
 
-	parseContextStack []int
-	dumpContext       []int
+	parseContextStack jsonContextStack
+	dumpContext       jsonContextStack
 
 	writer *bufio.Writer
 	reader *bufio.Reader
@@ -81,8 +110,8 @@
 		writer: bufio.NewWriter(t),
 		reader: bufio.NewReader(t),
 	}
-	v.parseContextStack = append(v.parseContextStack, int(_CONTEXT_IN_TOPLEVEL))
-	v.dumpContext = append(v.dumpContext, int(_CONTEXT_IN_TOPLEVEL))
+	v.parseContextStack.push(_CONTEXT_IN_TOPLEVEL)
+	v.dumpContext.push(_CONTEXT_IN_TOPLEVEL)
 	return v
 }
 
@@ -155,114 +184,113 @@
 	return fmt.Errorf("Expected '%s' but found '%s' while parsing JSON.", expected, actual)
 }
 
-func (p *TSimpleJSONProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
+func (p *TSimpleJSONProtocol) WriteMessageBegin(ctx context.Context, name string, typeId TMessageType, seqId int32) error {
 	p.resetContextStack() // THRIFT-3735
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
-	if e := p.WriteString(name); e != nil {
+	if e := p.WriteString(ctx, name); e != nil {
 		return e
 	}
-	if e := p.WriteByte(int8(typeId)); e != nil {
+	if e := p.WriteByte(ctx, int8(typeId)); e != nil {
 		return e
 	}
-	if e := p.WriteI32(seqId); e != nil {
+	if e := p.WriteI32(ctx, seqId); e != nil {
 		return e
 	}
 	return nil
 }
 
-func (p *TSimpleJSONProtocol) WriteMessageEnd() error {
+func (p *TSimpleJSONProtocol) WriteMessageEnd(ctx context.Context) error {
 	return p.OutputListEnd()
 }
 
-func (p *TSimpleJSONProtocol) WriteStructBegin(name string) error {
+func (p *TSimpleJSONProtocol) WriteStructBegin(ctx context.Context, name string) error {
 	if e := p.OutputObjectBegin(); e != nil {
 		return e
 	}
 	return nil
 }
 
-func (p *TSimpleJSONProtocol) WriteStructEnd() error {
+func (p *TSimpleJSONProtocol) WriteStructEnd(ctx context.Context) error {
 	return p.OutputObjectEnd()
 }
 
-func (p *TSimpleJSONProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
-	if e := p.WriteString(name); e != nil {
+func (p *TSimpleJSONProtocol) WriteFieldBegin(ctx context.Context, name string, typeId TType, id int16) error {
+	if e := p.WriteString(ctx, name); e != nil {
 		return e
 	}
 	return nil
 }
 
-func (p *TSimpleJSONProtocol) WriteFieldEnd() error {
-	//return p.OutputListEnd()
+func (p *TSimpleJSONProtocol) WriteFieldEnd(ctx context.Context) error {
 	return nil
 }
 
-func (p *TSimpleJSONProtocol) WriteFieldStop() error { return nil }
+func (p *TSimpleJSONProtocol) WriteFieldStop(ctx context.Context) error { return nil }
 
-func (p *TSimpleJSONProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+func (p *TSimpleJSONProtocol) WriteMapBegin(ctx context.Context, keyType TType, valueType TType, size int) error {
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
-	if e := p.WriteByte(int8(keyType)); e != nil {
+	if e := p.WriteByte(ctx, int8(keyType)); e != nil {
 		return e
 	}
-	if e := p.WriteByte(int8(valueType)); e != nil {
+	if e := p.WriteByte(ctx, int8(valueType)); e != nil {
 		return e
 	}
-	return p.WriteI32(int32(size))
+	return p.WriteI32(ctx, int32(size))
 }
 
-func (p *TSimpleJSONProtocol) WriteMapEnd() error {
+func (p *TSimpleJSONProtocol) WriteMapEnd(ctx context.Context) error {
 	return p.OutputListEnd()
 }
 
-func (p *TSimpleJSONProtocol) WriteListBegin(elemType TType, size int) error {
+func (p *TSimpleJSONProtocol) WriteListBegin(ctx context.Context, elemType TType, size int) error {
 	return p.OutputElemListBegin(elemType, size)
 }
 
-func (p *TSimpleJSONProtocol) WriteListEnd() error {
+func (p *TSimpleJSONProtocol) WriteListEnd(ctx context.Context) error {
 	return p.OutputListEnd()
 }
 
-func (p *TSimpleJSONProtocol) WriteSetBegin(elemType TType, size int) error {
+func (p *TSimpleJSONProtocol) WriteSetBegin(ctx context.Context, elemType TType, size int) error {
 	return p.OutputElemListBegin(elemType, size)
 }
 
-func (p *TSimpleJSONProtocol) WriteSetEnd() error {
+func (p *TSimpleJSONProtocol) WriteSetEnd(ctx context.Context) error {
 	return p.OutputListEnd()
 }
 
-func (p *TSimpleJSONProtocol) WriteBool(b bool) error {
+func (p *TSimpleJSONProtocol) WriteBool(ctx context.Context, b bool) error {
 	return p.OutputBool(b)
 }
 
-func (p *TSimpleJSONProtocol) WriteByte(b int8) error {
-	return p.WriteI32(int32(b))
+func (p *TSimpleJSONProtocol) WriteByte(ctx context.Context, b int8) error {
+	return p.WriteI32(ctx, int32(b))
 }
 
-func (p *TSimpleJSONProtocol) WriteI16(v int16) error {
-	return p.WriteI32(int32(v))
+func (p *TSimpleJSONProtocol) WriteI16(ctx context.Context, v int16) error {
+	return p.WriteI32(ctx, int32(v))
 }
 
-func (p *TSimpleJSONProtocol) WriteI32(v int32) error {
+func (p *TSimpleJSONProtocol) WriteI32(ctx context.Context, v int32) error {
 	return p.OutputI64(int64(v))
 }
 
-func (p *TSimpleJSONProtocol) WriteI64(v int64) error {
+func (p *TSimpleJSONProtocol) WriteI64(ctx context.Context, v int64) error {
 	return p.OutputI64(int64(v))
 }
 
-func (p *TSimpleJSONProtocol) WriteDouble(v float64) error {
+func (p *TSimpleJSONProtocol) WriteDouble(ctx context.Context, v float64) error {
 	return p.OutputF64(v)
 }
 
-func (p *TSimpleJSONProtocol) WriteString(v string) error {
+func (p *TSimpleJSONProtocol) WriteString(ctx context.Context, v string) error {
 	return p.OutputString(v)
 }
 
-func (p *TSimpleJSONProtocol) WriteBinary(v []byte) error {
+func (p *TSimpleJSONProtocol) WriteBinary(ctx context.Context, v []byte) error {
 	// JSON library only takes in a string,
 	// not an arbitrary byte array, to ensure bytes are transmitted
 	// efficiently we must convert this into a valid JSON string
@@ -288,39 +316,39 @@
 }
 
 // Reading methods.
-func (p *TSimpleJSONProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+func (p *TSimpleJSONProtocol) ReadMessageBegin(ctx context.Context) (name string, typeId TMessageType, seqId int32, err error) {
 	p.resetContextStack() // THRIFT-3735
 	if isNull, err := p.ParseListBegin(); isNull || err != nil {
 		return name, typeId, seqId, err
 	}
-	if name, err = p.ReadString(); err != nil {
+	if name, err = p.ReadString(ctx); err != nil {
 		return name, typeId, seqId, err
 	}
-	bTypeId, err := p.ReadByte()
+	bTypeId, err := p.ReadByte(ctx)
 	typeId = TMessageType(bTypeId)
 	if err != nil {
 		return name, typeId, seqId, err
 	}
-	if seqId, err = p.ReadI32(); err != nil {
+	if seqId, err = p.ReadI32(ctx); err != nil {
 		return name, typeId, seqId, err
 	}
 	return name, typeId, seqId, nil
 }
 
-func (p *TSimpleJSONProtocol) ReadMessageEnd() error {
+func (p *TSimpleJSONProtocol) ReadMessageEnd(ctx context.Context) error {
 	return p.ParseListEnd()
 }
 
-func (p *TSimpleJSONProtocol) ReadStructBegin() (name string, err error) {
+func (p *TSimpleJSONProtocol) ReadStructBegin(ctx context.Context) (name string, err error) {
 	_, err = p.ParseObjectStart()
 	return "", err
 }
 
-func (p *TSimpleJSONProtocol) ReadStructEnd() error {
+func (p *TSimpleJSONProtocol) ReadStructEnd(ctx context.Context) error {
 	return p.ParseObjectEnd()
 }
 
-func (p *TSimpleJSONProtocol) ReadFieldBegin() (string, TType, int16, error) {
+func (p *TSimpleJSONProtocol) ReadFieldBegin(ctx context.Context) (string, TType, int16, error) {
 	if err := p.ParsePreValue(); err != nil {
 		return "", STOP, 0, err
 	}
@@ -339,21 +367,6 @@
 				return name, STOP, 0, err
 			}
 			return name, STOP, -1, p.ParsePostValue()
-			/*
-			   if err = p.ParsePostValue(); err != nil {
-			     return name, STOP, 0, err
-			   }
-			   if isNull, err := p.ParseListBegin(); isNull || err != nil {
-			     return name, STOP, 0, err
-			   }
-			   bType, err := p.ReadByte()
-			   thetype := TType(bType)
-			   if err != nil {
-			     return name, thetype, 0, err
-			   }
-			   id, err := p.ReadI16()
-			   return name, thetype, id, err
-			*/
 		}
 		e := fmt.Errorf("Expected \"}\" or '\"', but found: '%s'", string(b))
 		return "", STOP, 0, NewTProtocolExceptionWithType(INVALID_DATA, e)
@@ -361,57 +374,56 @@
 	return "", STOP, 0, NewTProtocolException(io.EOF)
 }
 
-func (p *TSimpleJSONProtocol) ReadFieldEnd() error {
+func (p *TSimpleJSONProtocol) ReadFieldEnd(ctx context.Context) error {
 	return nil
-	//return p.ParseListEnd()
 }
 
-func (p *TSimpleJSONProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, e error) {
+func (p *TSimpleJSONProtocol) ReadMapBegin(ctx context.Context) (keyType TType, valueType TType, size int, e error) {
 	if isNull, e := p.ParseListBegin(); isNull || e != nil {
 		return VOID, VOID, 0, e
 	}
 
 	// read keyType
-	bKeyType, e := p.ReadByte()
+	bKeyType, e := p.ReadByte(ctx)
 	keyType = TType(bKeyType)
 	if e != nil {
 		return keyType, valueType, size, e
 	}
 
 	// read valueType
-	bValueType, e := p.ReadByte()
+	bValueType, e := p.ReadByte(ctx)
 	valueType = TType(bValueType)
 	if e != nil {
 		return keyType, valueType, size, e
 	}
 
 	// read size
-	iSize, err := p.ReadI64()
+	iSize, err := p.ReadI64(ctx)
 	size = int(iSize)
 	return keyType, valueType, size, err
 }
 
-func (p *TSimpleJSONProtocol) ReadMapEnd() error {
+func (p *TSimpleJSONProtocol) ReadMapEnd(ctx context.Context) error {
 	return p.ParseListEnd()
 }
 
-func (p *TSimpleJSONProtocol) ReadListBegin() (elemType TType, size int, e error) {
+func (p *TSimpleJSONProtocol) ReadListBegin(ctx context.Context) (elemType TType, size int, e error) {
 	return p.ParseElemListBegin()
 }
 
-func (p *TSimpleJSONProtocol) ReadListEnd() error {
+func (p *TSimpleJSONProtocol) ReadListEnd(ctx context.Context) error {
 	return p.ParseListEnd()
 }
 
-func (p *TSimpleJSONProtocol) ReadSetBegin() (elemType TType, size int, e error) {
+func (p *TSimpleJSONProtocol) ReadSetBegin(ctx context.Context) (elemType TType, size int, e error) {
 	return p.ParseElemListBegin()
 }
 
-func (p *TSimpleJSONProtocol) ReadSetEnd() error {
+func (p *TSimpleJSONProtocol) ReadSetEnd(ctx context.Context) error {
 	return p.ParseListEnd()
 }
 
-func (p *TSimpleJSONProtocol) ReadBool() (bool, error) {
+func (p *TSimpleJSONProtocol) ReadBool(ctx context.Context) (bool, error) {
 	var value bool
 
 	if err := p.ParsePreValue(); err != nil {
@@ -466,32 +478,32 @@
 	return value, p.ParsePostValue()
 }
 
-func (p *TSimpleJSONProtocol) ReadByte() (int8, error) {
-	v, err := p.ReadI64()
+func (p *TSimpleJSONProtocol) ReadByte(ctx context.Context) (int8, error) {
+	v, err := p.ReadI64(ctx)
 	return int8(v), err
 }
 
-func (p *TSimpleJSONProtocol) ReadI16() (int16, error) {
-	v, err := p.ReadI64()
+func (p *TSimpleJSONProtocol) ReadI16(ctx context.Context) (int16, error) {
+	v, err := p.ReadI64(ctx)
 	return int16(v), err
 }
 
-func (p *TSimpleJSONProtocol) ReadI32() (int32, error) {
-	v, err := p.ReadI64()
+func (p *TSimpleJSONProtocol) ReadI32(ctx context.Context) (int32, error) {
+	v, err := p.ReadI64(ctx)
 	return int32(v), err
 }
 
-func (p *TSimpleJSONProtocol) ReadI64() (int64, error) {
+func (p *TSimpleJSONProtocol) ReadI64(ctx context.Context) (int64, error) {
 	v, _, err := p.ParseI64()
 	return v, err
 }
 
-func (p *TSimpleJSONProtocol) ReadDouble() (float64, error) {
+func (p *TSimpleJSONProtocol) ReadDouble(ctx context.Context) (float64, error) {
 	v, _, err := p.ParseF64()
 	return v, err
 }
 
-func (p *TSimpleJSONProtocol) ReadString() (string, error) {
+func (p *TSimpleJSONProtocol) ReadString(ctx context.Context) (string, error) {
 	var v string
 	if err := p.ParsePreValue(); err != nil {
 		return v, err
@@ -521,7 +533,7 @@
 	return v, p.ParsePostValue()
 }
 
-func (p *TSimpleJSONProtocol) ReadBinary() ([]byte, error) {
+func (p *TSimpleJSONProtocol) ReadBinary(ctx context.Context) ([]byte, error) {
 	var v []byte
 	if err := p.ParsePreValue(); err != nil {
 		return nil, err
@@ -552,12 +564,12 @@
 	return v, p.ParsePostValue()
 }
 
-func (p *TSimpleJSONProtocol) Flush() (err error) {
+func (p *TSimpleJSONProtocol) Flush(ctx context.Context) (err error) {
 	return NewTProtocolException(p.writer.Flush())
 }
 
-func (p *TSimpleJSONProtocol) Skip(fieldType TType) (err error) {
-	return SkipDefaultDepth(p, fieldType)
+func (p *TSimpleJSONProtocol) Skip(ctx context.Context, fieldType TType) (err error) {
+	return SkipDefaultDepth(ctx, p, fieldType)
 }
 
 func (p *TSimpleJSONProtocol) Transport() TTransport {
@@ -565,41 +577,41 @@
 }
 
 func (p *TSimpleJSONProtocol) OutputPreValue() error {
-	cxt := _ParseContext(p.dumpContext[len(p.dumpContext)-1])
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	switch cxt {
 	case _CONTEXT_IN_LIST, _CONTEXT_IN_OBJECT_NEXT_KEY:
 		if _, e := p.write(JSON_COMMA); e != nil {
 			return NewTProtocolException(e)
 		}
-		break
 	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
 		if _, e := p.write(JSON_COLON); e != nil {
 			return NewTProtocolException(e)
 		}
-		break
 	}
 	return nil
 }
 
 func (p *TSimpleJSONProtocol) OutputPostValue() error {
-	cxt := _ParseContext(p.dumpContext[len(p.dumpContext)-1])
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	switch cxt {
 	case _CONTEXT_IN_LIST_FIRST:
-		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
-		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_LIST))
-		break
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_LIST)
 	case _CONTEXT_IN_OBJECT_FIRST:
-		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
-		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_NEXT_VALUE))
-		break
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_OBJECT_NEXT_VALUE)
 	case _CONTEXT_IN_OBJECT_NEXT_KEY:
-		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
-		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_NEXT_VALUE))
-		break
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_OBJECT_NEXT_VALUE)
 	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
-		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
-		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_NEXT_KEY))
-		break
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_OBJECT_NEXT_KEY)
 	}
 	return nil
 }
@@ -614,10 +626,13 @@
 	} else {
 		v = string(JSON_FALSE)
 	}
-	switch _ParseContext(p.dumpContext[len(p.dumpContext)-1]) {
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	switch cxt {
 	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
 		v = jsonQuote(v)
-	default:
 	}
 	if e := p.OutputStringData(v); e != nil {
 		return e
@@ -647,11 +662,14 @@
 	} else if math.IsInf(value, -1) {
 		v = string(JSON_QUOTE) + JSON_NEGATIVE_INFINITY + string(JSON_QUOTE)
 	} else {
+		cxt, ok := p.dumpContext.peek()
+		if !ok {
+			return errEmptyJSONContextStack
+		}
 		v = strconv.FormatFloat(value, 'g', -1, 64)
-		switch _ParseContext(p.dumpContext[len(p.dumpContext)-1]) {
+		switch cxt {
 		case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
 			v = string(JSON_QUOTE) + v + string(JSON_QUOTE)
-		default:
 		}
 	}
 	if e := p.OutputStringData(v); e != nil {
@@ -664,11 +682,14 @@
 	if e := p.OutputPreValue(); e != nil {
 		return e
 	}
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	v := strconv.FormatInt(value, 10)
-	switch _ParseContext(p.dumpContext[len(p.dumpContext)-1]) {
+	switch cxt {
 	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
 		v = jsonQuote(v)
-	default:
 	}
 	if e := p.OutputStringData(v); e != nil {
 		return e
@@ -698,7 +719,7 @@
 	if _, e := p.write(JSON_LBRACE); e != nil {
 		return NewTProtocolException(e)
 	}
-	p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_FIRST))
+	p.dumpContext.push(_CONTEXT_IN_OBJECT_FIRST)
 	return nil
 }
 
@@ -706,7 +727,10 @@
 	if _, e := p.write(JSON_RBRACE); e != nil {
 		return NewTProtocolException(e)
 	}
-	p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+	_, ok := p.dumpContext.pop()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	if e := p.OutputPostValue(); e != nil {
 		return e
 	}
@@ -720,7 +744,7 @@
 	if _, e := p.write(JSON_LBRACKET); e != nil {
 		return NewTProtocolException(e)
 	}
-	p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_LIST_FIRST))
+	p.dumpContext.push(_CONTEXT_IN_LIST_FIRST)
 	return nil
 }
 
@@ -728,7 +752,10 @@
 	if _, e := p.write(JSON_RBRACKET); e != nil {
 		return NewTProtocolException(e)
 	}
-	p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+	_, ok := p.dumpContext.pop()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	if e := p.OutputPostValue(); e != nil {
 		return e
 	}
@@ -739,10 +766,10 @@
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
-	if e := p.WriteByte(int8(elemType)); e != nil {
+	if e := p.OutputI64(int64(elemType)); e != nil {
 		return e
 	}
-	if e := p.WriteI64(int64(size)); e != nil {
+	if e := p.OutputI64(int64(size)); e != nil {
 		return e
 	}
 	return nil
@@ -752,7 +779,10 @@
 	if e := p.readNonSignificantWhitespace(); e != nil {
 		return NewTProtocolException(e)
 	}
-	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	cxt, ok := p.parseContextStack.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	b, _ := p.reader.Peek(1)
 	switch cxt {
 	case _CONTEXT_IN_LIST:
@@ -771,7 +801,6 @@
 				return NewTProtocolExceptionWithType(INVALID_DATA, e)
 			}
 		}
-		break
 	case _CONTEXT_IN_OBJECT_NEXT_KEY:
 		if len(b) > 0 {
 			switch b[0] {
@@ -788,7 +817,6 @@
 				return NewTProtocolExceptionWithType(INVALID_DATA, e)
 			}
 		}
-		break
 	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
 		if len(b) > 0 {
 			switch b[0] {
@@ -803,7 +831,6 @@
 				return NewTProtocolExceptionWithType(INVALID_DATA, e)
 			}
 		}
-		break
 	}
 	return nil
 }
@@ -812,20 +839,20 @@
 	if e := p.readNonSignificantWhitespace(); e != nil {
 		return NewTProtocolException(e)
 	}
-	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	cxt, ok := p.parseContextStack.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
 	switch cxt {
 	case _CONTEXT_IN_LIST_FIRST:
-		p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
-		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_LIST))
-		break
+		p.parseContextStack.pop()
+		p.parseContextStack.push(_CONTEXT_IN_LIST)
 	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
-		p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
-		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_OBJECT_NEXT_VALUE))
-		break
+		p.parseContextStack.pop()
+		p.parseContextStack.push(_CONTEXT_IN_OBJECT_NEXT_VALUE)
 	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
-		p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
-		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_OBJECT_NEXT_KEY))
-		break
+		p.parseContextStack.pop()
+		p.parseContextStack.push(_CONTEXT_IN_OBJECT_NEXT_KEY)
 	}
 	return nil
 }
@@ -978,7 +1005,7 @@
 	}
 	if len(b) > 0 && b[0] == JSON_LBRACE[0] {
 		p.reader.ReadByte()
-		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_OBJECT_FIRST))
+		p.parseContextStack.push(_CONTEXT_IN_OBJECT_FIRST)
 		return false, nil
 	} else if p.safePeekContains(JSON_NULL) {
 		return true, nil
@@ -991,7 +1018,7 @@
 	if isNull, err := p.readIfNull(); isNull || err != nil {
 		return err
 	}
-	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	cxt, _ := p.parseContextStack.peek()
 	if (cxt != _CONTEXT_IN_OBJECT_FIRST) && (cxt != _CONTEXT_IN_OBJECT_NEXT_KEY) {
 		e := fmt.Errorf("Expected to be in the Object Context, but not in Object Context (%d)", cxt)
 		return NewTProtocolExceptionWithType(INVALID_DATA, e)
@@ -1009,7 +1036,7 @@
 			break
 		}
 	}
-	p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
+	p.parseContextStack.pop()
 	return p.ParsePostValue()
 }
 
@@ -1023,7 +1050,7 @@
 		return false, err
 	}
 	if len(b) >= 1 && b[0] == JSON_LBRACKET[0] {
-		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_LIST_FIRST))
+		p.parseContextStack.push(_CONTEXT_IN_LIST_FIRST)
 		p.reader.ReadByte()
 		isNull = false
 	} else if p.safePeekContains(JSON_NULL) {
@@ -1038,12 +1065,12 @@
 	if isNull, e := p.ParseListBegin(); isNull || e != nil {
 		return VOID, 0, e
 	}
-	bElemType, err := p.ReadByte()
+	bElemType, _, err := p.ParseI64()
 	elemType = TType(bElemType)
 	if err != nil {
 		return elemType, size, err
 	}
-	nSize, err2 := p.ReadI64()
+	nSize, _, err2 := p.ParseI64()
 	size = int(nSize)
 	return elemType, size, err2
 }
@@ -1052,7 +1079,7 @@
 	if isNull, err := p.readIfNull(); isNull || err != nil {
 		return err
 	}
-	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	cxt, _ := p.parseContextStack.peek()
 	if cxt != _CONTEXT_IN_LIST {
 		e := fmt.Errorf("Expected to be in the List Context, but not in List Context (%d)", cxt)
 		return NewTProtocolExceptionWithType(INVALID_DATA, e)
@@ -1064,14 +1091,16 @@
 	for _, char := range line {
 		switch char {
 		default:
-			e := fmt.Errorf("Expecting end of list \"]\", but found: \"%s\"", line)
+			e := fmt.Errorf("Expecting end of list \"]\", but found: \"%v\"", line)
 			return NewTProtocolExceptionWithType(INVALID_DATA, e)
 		case ' ', '\n', '\r', '\t', rune(JSON_RBRACKET[0]):
 			break
 		}
 	}
-	p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
-	if _ParseContext(p.parseContextStack[len(p.parseContextStack)-1]) == _CONTEXT_IN_TOPLEVEL {
+	p.parseContextStack.pop()
+	if cxt, ok := p.parseContextStack.peek(); !ok {
+		return errEmptyJSONContextStack
+	} else if cxt == _CONTEXT_IN_TOPLEVEL {
 		return nil
 	}
 	return p.ParsePostValue()
@@ -1315,7 +1344,7 @@
 func (p *TSimpleJSONProtocol) safePeekContains(b []byte) bool {
 	for i := 0; i < len(b); i++ {
 		a, _ := p.reader.Peek(i + 1)
-		if len(a) == 0 || a[i] != b[i] {
+		if len(a) < (i+1) || a[i] != b[i] {
 			return false
 		}
 	}
@@ -1324,8 +1353,8 @@
 
 // Reset the context stack to its initial state.
 func (p *TSimpleJSONProtocol) resetContextStack() {
-	p.parseContextStack = []int{int(_CONTEXT_IN_TOPLEVEL)}
-	p.dumpContext = []int{int(_CONTEXT_IN_TOPLEVEL)}
+	p.parseContextStack = jsonContextStack{_CONTEXT_IN_TOPLEVEL}
+	p.dumpContext = jsonContextStack{_CONTEXT_IN_TOPLEVEL}
 }
 
 func (p *TSimpleJSONProtocol) write(b []byte) (int, error) {
@@ -1335,3 +1364,10 @@
 	}
 	return n, err
 }
+
+// SetTConfiguration implements TConfigurationSetter for propagation.
+func (p *TSimpleJSONProtocol) SetTConfiguration(conf *TConfiguration) {
+	PropagateTConfiguration(p.trans, conf)
+}
+
+var _ TConfigurationSetter = (*TSimpleJSONProtocol)(nil)