Remove problematic nanoTime() calls

opentracing-impl-java8/src/main/java/io/opentracing/AbstractSpan.java

@@ -124,17 +124,17 @@ public final Map<String,String> getBaggage() {
 
     @Override
     public final Span log(String event) {
-        return log(System.nanoTime() / 1000, event);
+        return log(nowMicros(), event);
     }
 
     @Override
     public final Span log(long timestampMicros, String event) {
-        return log(System.nanoTime() / 1000, Collections.singletonMap("event", event));
+        return log(timestampMicros, Collections.singletonMap("event", event));
     }
 
     @Override
     public final Span log(Map<String, ?> fields) {
-        return log(System.nanoTime() / 1000, fields);
+        return log(nowMicros(), fields);
     }
 
     @Override
@@ -179,4 +179,9 @@ final class LogData {
             this.fields = fields;
         }
     }
+
+    static long nowMicros() {
+        Instant now = Instant.now();
+        return (now.getEpochSecond() * 1000000) + (now.getNano() / 1000);
+    }
 }

opentracing-mock/src/main/java/io/opentracing/mock/MockSpan.java

@@ -89,7 +89,7 @@ public synchronized MockContext context() {
 
     @Override
     public void finish() {
-        this.finish(System.nanoTime() / 1000);
+        this.finish(nowMicros());
     }
 
     @Override
@@ -123,8 +123,7 @@ public synchronized Span setTag(String key, Number value) {
 
     @Override
     public final Span log(Map<String, ?> fields) {
-        long nowMicros = System.nanoTime() / 1000;
-        return log(nowMicros, fields);
+        return log(nowMicros(), fields);
     }
     @Override
     public final Span log(long timestampMicros, Map<String, ?> fields) {
@@ -134,7 +133,7 @@ public final Span log(long timestampMicros, Map<String, ?> fields) {
 
     @Override
     public Span log(String event) {
-        return this.log(System.nanoTime() / 1000, event);
+        return this.log(nowMicros(), event);
     }
 
     @Override
@@ -144,7 +143,7 @@ public Span log(long timestampMicroseconds, String event) {
 
     @Override
     public Span log(String eventName, Object payload) {
-        return this.log(System.nanoTime() / 1000, eventName, payload);
+        return this.log(nowMicros(), eventName, payload);
     }
 
     @Override
@@ -253,4 +252,8 @@ public long timestampMicros() {
     static long nextId() {
         return nextId.addAndGet(1);
     }
+
+    static long nowMicros() {
+        return System.currentTimeMillis() * 1000;
+    }
 }