= system-metrics: The sigar not implemented exceptions are listed as warnings. closes #235

22 files changed, 115 insertions, 62 deletions

diff --git a/kamon-core/src/main/scala/kamon/Kamon.scala b/kamon-core/src/main/scala/kamon/Kamon.scala
index d819588c..f9232a20 100644
--- a/kamon-core/src/main/scala/kamon/Kamon.scala
+++ b/kamon-core/src/main/scala/kamon/Kamon.scala
@@ -79,7 +79,7 @@ object Kamon {
     apply(key)
 
   private def ifStarted[T](thunk: KamonCoreComponents ⇒ T): T =
-    _coreComponents.map(thunk(_)) getOrElse (sys.error("Kamon has not been started yet."))
+    _coreComponents.map(thunk(_)) getOrElse sys.error("Kamon has not been started yet.")
 
 }
 
diff --git a/kamon-play-2.3.x/src/main/scala/kamon/play/Play.scala b/kamon-play-2.3.x/src/main/scala/kamon/play/Play.scala
index f704dba0..58153937 100644
--- a/kamon-play-2.3.x/src/main/scala/kamon/play/Play.scala
+++ b/kamon-play-2.3.x/src/main/scala/kamon/play/Play.scala
@@ -1,6 +1,6 @@
 /*
  * =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
@@ -75,7 +75,7 @@ class DefaultNameGenerator extends NameGenerator {
       }
       traceName
     })
-  } getOrElse "UntaggedTraces"
+  } getOrElse "UntaggedTrace"
 
   def generateHttpClientSegmentName(request: WSRequest): String = request.url
 }
diff --git a/kamon-play-2.3.x/src/main/scala/kamon/play/action/KamonTraceActions.scala b/kamon-play-2.3.x/src/main/scala/kamon/play/action/KamonTraceActions.scala
index 854989a4..72308b35 100644
--- a/kamon-play-2.3.x/src/main/scala/kamon/play/action/KamonTraceActions.scala
+++ b/kamon-play-2.3.x/src/main/scala/kamon/play/action/KamonTraceActions.scala
@@ -1,5 +1,5 @@
 /* ===================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala b/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala
index 3c79fae4..0ef3810e 100644
--- a/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala
+++ b/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala
@@ -1,5 +1,5 @@
 /* =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
diff --git a/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala b/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala
index 66c933f6..2536c77c 100644
--- a/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala
+++ b/kamon-play-2.3.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala
@@ -1,5 +1,5 @@
 /* ===================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/kamon-play-2.3.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala b/kamon-play-2.3.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala
index a86fcdf6..cb6a9828 100644
--- a/kamon-play-2.3.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala
+++ b/kamon-play-2.3.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala
@@ -1,5 +1,5 @@
 /* =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License") you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
diff --git a/kamon-play-2.3.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala b/kamon-play-2.3.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala
index 9ef26350..2796cfa5 100644
--- a/kamon-play-2.3.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala
+++ b/kamon-play-2.3.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala
@@ -1,5 +1,5 @@
 /* =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
diff --git a/kamon-play-2.3.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala b/kamon-play-2.3.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
index 93ace7be..7683f01e 100644
--- a/kamon-play-2.3.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
+++ b/kamon-play-2.3.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
@@ -1,5 +1,5 @@
 /* ===================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/kamon-play-2.4.x/src/main/scala/kamon/play/Play.scala b/kamon-play-2.4.x/src/main/scala/kamon/play/Play.scala
index 5f874b92..53a5b80a 100644
--- a/kamon-play-2.4.x/src/main/scala/kamon/play/Play.scala
+++ b/kamon-play-2.4.x/src/main/scala/kamon/play/Play.scala
@@ -1,6 +1,6 @@
 /*
  * =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
@@ -75,7 +75,7 @@ class DefaultNameGenerator extends NameGenerator {
       }
       traceName
     })
-  } getOrElse "UntaggedTraces"
+  } getOrElse "UntaggedTrace"
 
   def generateHttpClientSegmentName(request: WSRequest): String = request.url
 }
diff --git a/kamon-play-2.4.x/src/main/scala/kamon/play/action/KamonTraceActions.scala b/kamon-play-2.4.x/src/main/scala/kamon/play/action/KamonTraceActions.scala
index 854989a4..72308b35 100644
--- a/kamon-play-2.4.x/src/main/scala/kamon/play/action/KamonTraceActions.scala
+++ b/kamon-play-2.4.x/src/main/scala/kamon/play/action/KamonTraceActions.scala
@@ -1,5 +1,5 @@
 /* ===================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala b/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala
index 3c79fae4..0ef3810e 100644
--- a/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala
+++ b/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/LoggerLikeInstrumentation.scala
@@ -1,5 +1,5 @@
 /* =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
diff --git a/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala b/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala
index 93f6d95a..477ade0a 100644
--- a/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala
+++ b/kamon-play-2.4.x/src/main/scala/kamon/play/instrumentation/WSInstrumentation.scala
@@ -1,5 +1,5 @@
 /* ===================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/kamon-play-2.4.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala b/kamon-play-2.4.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala
index 625c5b55..6085d046 100644
--- a/kamon-play-2.4.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala
+++ b/kamon-play-2.4.x/src/test/scala/kamon/play/LoggerLikeInstrumentationSpec.scala
@@ -1,5 +1,5 @@
 /* =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License") you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
diff --git a/kamon-play-2.4.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala b/kamon-play-2.4.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala
index c30d0529..36a2ddfe 100644
--- a/kamon-play-2.4.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala
+++ b/kamon-play-2.4.x/src/test/scala/kamon/play/RequestInstrumentationSpec.scala
@@ -1,5 +1,5 @@
 /* =========================================================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
  * except in compliance with the License. You may obtain a copy of the License at
diff --git a/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala b/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
index 7396538e..aa379347 100644
--- a/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
+++ b/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
@@ -1,5 +1,5 @@
 /* ===================================================
- * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ * Copyright © 2013-2015 the kamon project <http://kamon.io/>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/CpuMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/CpuMetrics.scala
index 0e9a5b53..54b95ab7 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/CpuMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/CpuMetrics.scala
@@ -16,6 +16,7 @@
 
 package kamon.system.sigar
 
+import akka.event.LoggingAdapter
 import kamon.metric.GenericEntityRecorder
 import kamon.metric.instrument.InstrumentFactory
 import org.hyperic.sigar.Sigar
@@ -28,7 +29,7 @@ import org.hyperic.sigar.Sigar
  *    - idle:  Total percentage of system cpu idle time
  *    - stolen: Total percentage of system cpu involuntary wait time. @see [[https://www.datadoghq.com/2013/08/understanding-aws-stolen-cpu-and-how-it-affects-your-apps/ "Understanding Stolen Cpu"]]
  */
-class CpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class CpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
   val user = histogram("cpu-user")
   val system = histogram("cpu-system")
   val Wait = histogram("cpu-wait")
@@ -36,18 +37,29 @@ class CpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends Gen
   val stolen = histogram("cpu-stolen")
 
   def update(): Unit = {
-    val cpuPerc = sigar.getCpuPerc
+    import SigarSafeRunner._
 
-    user.record((cpuPerc.getUser * 100L).toLong)
-    system.record((cpuPerc.getSys * 100L).toLong)
-    Wait.record((cpuPerc.getWait * 100L).toLong)
-    idle.record((cpuPerc.getIdle * 100L).toLong)
-    stolen.record((cpuPerc.getStolen * 100L).toLong)
+    def cpuPerc = {
+      val cpuPerc = sigar.getCpuPerc
+      ((cpuPerc.getUser * 100L).toLong,
+        (cpuPerc.getSys * 100L).toLong,
+        (cpuPerc.getWait * 100L).toLong,
+        (cpuPerc.getIdle * 100L).toLong,
+        (cpuPerc.getStolen * 100L).toLong)
+    }
+
+    val (cpuUser, cpuSys, cpuWait, cpuIdle, cpuStolen) = runSafe(cpuPerc, (0L, 0L, 0L, 0L, 0L), "cpu", logger)
+
+    user.record(cpuUser)
+    system.record(cpuSys)
+    Wait.record(cpuWait)
+    idle.record(cpuIdle)
+    stolen.record(cpuStolen)
   }
 }
 
 object CpuMetrics extends SigarMetricRecorderCompanion("cpu") {
 
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): CpuMetrics =
-    new CpuMetrics(sigar, instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter): CpuMetrics =
+    new CpuMetrics(sigar, instrumentFactory, logger)
 }
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala
index d3bfefbe..5e2a27ea 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala
@@ -16,6 +16,7 @@
 
 package kamon.system.sigar
 
+import akka.event.LoggingAdapter
 import kamon.metric.GenericEntityRecorder
 import kamon.metric.instrument.{ Memory, InstrumentFactory }
 import org.hyperic.sigar.{ DiskUsage, FileSystem, Sigar }
@@ -26,11 +27,13 @@ import scala.util.Try
  *    - readBytes: Total number of physical disk reads.
  *    - writesBytes:  Total number of physical disk writes.
  */
-class FileSystemMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class FileSystemMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+  import kamon.system.sigar.SigarSafeRunner._
+
   val reads = DiffRecordingHistogram(histogram("file-system-reads", Memory.Bytes))
   val writes = DiffRecordingHistogram(histogram("file-system-writes", Memory.Bytes))
 
-  val fileSystems = sigar.getFileSystemList.filter(_.getType == FileSystem.TYPE_LOCAL_DISK).map(_.getDevName).toSet
+  val fileSystems = runSafe(sigar.getFileSystemList.filter(_.getType == FileSystem.TYPE_LOCAL_DISK).map(_.getDevName).toSet, Set.empty[String], "file-system", logger)
 
   def sumOfAllFileSystems(sigar: Sigar, thunk: DiskUsage ⇒ Long): Long = Try {
     fileSystems.map(i ⇒ thunk(sigar.getDiskUsage(i))).fold(0L)(_ + _)
@@ -43,6 +46,6 @@ class FileSystemMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) exte
 }
 
 object FileSystemMetrics extends SigarMetricRecorderCompanion("file-system") {
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): FileSystemMetrics =
-    new FileSystemMetrics(sigar, instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter): FileSystemMetrics =
+    new FileSystemMetrics(sigar, instrumentFactory, logger)
 }
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/LoadAverageMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/LoadAverageMetrics.scala
index 8d7bd808..46baeea4 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/LoadAverageMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/LoadAverageMetrics.scala
@@ -16,6 +16,7 @@
 
 package kamon.system.sigar
 
+import akka.event.LoggingAdapter
 import kamon.metric.GenericEntityRecorder
 import kamon.metric.instrument.InstrumentFactory
 import org.hyperic.sigar.Sigar
@@ -24,13 +25,15 @@ import org.hyperic.sigar.Sigar
  *  Load Average metrics, as reported by Sigar:
  *    - The system load averages for the past 1, 5, and 15 minutes.
  */
-class LoadAverageMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class LoadAverageMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+  import SigarSafeRunner._
+
   val oneMinute = histogram("one-minute")
   val fiveMinutes = histogram("five-minutes")
   val fifteenMinutes = histogram("fifteen-minutes")
 
   def update(): Unit = {
-    val loadAverage = sigar.getLoadAverage
+    val loadAverage = runSafe(sigar.getLoadAverage, Array(0D, 0D, 0D), "load-average", logger)
 
     oneMinute.record(loadAverage(0).toLong)
     fiveMinutes.record(loadAverage(1).toLong)
@@ -40,6 +43,6 @@ class LoadAverageMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) ext
 
 object LoadAverageMetrics extends SigarMetricRecorderCompanion("load-average") {
 
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): LoadAverageMetrics =
-    new LoadAverageMetrics(sigar, instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter): LoadAverageMetrics =
+    new LoadAverageMetrics(sigar, instrumentFactory, logger)
 }
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/MemoryMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/MemoryMetrics.scala
index 787c9f2f..19fa81d8 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/MemoryMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/MemoryMetrics.scala
@@ -16,6 +16,7 @@
 
 package kamon.system.sigar
 
+import akka.event.LoggingAdapter
 import kamon.metric.GenericEntityRecorder
 import kamon.metric.instrument.{ Memory, InstrumentFactory }
 import org.hyperic.sigar.Sigar
@@ -27,7 +28,9 @@ import org.hyperic.sigar.Sigar
  *    - swap-used: Total used system swap.
  *    - swap-free: Total free system swap.
  */
-class MemoryMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class MemoryMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+  import SigarSafeRunner._
+
   val used = histogram("memory-used", Memory.Bytes)
   val cached = histogram("memory-cache-and-buffer", Memory.Bytes)
   val free = histogram("memory-free", Memory.Bytes)
@@ -36,22 +39,33 @@ class MemoryMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends
   val swapFree = histogram("swap-free", Memory.Bytes)
 
   def update(): Unit = {
-    val mem = sigar.getMem
-    val swap = sigar.getSwap
-    val cachedMemory = if (mem.getActualFree > mem.getFree) mem.getActualFree - mem.getFree else 0L
+    def mem = {
+      val mem = sigar.getMem
+      (mem.getActualUsed, mem.getActualFree, mem.getFree, mem.getTotal)
+    }
+
+    def swap = {
+      val swap = sigar.getSwap
+      (swap.getUsed, swap.getFree)
+    }
+
+    val (memActualUsed, memActualFree, memFree, memTotal) = runSafe(mem, (0L, 0L, 0L, 0L), "memory", logger)
+    val (memSwapUsed, memSwapFree) = runSafe(swap, (0L, 0L), "swap", logger)
+
+    def cachedMemory = if (memActualFree > memFree) memActualFree - memFree else 0L
 
-    used.record(mem.getActualUsed)
-    free.record(mem.getActualFree)
+    used.record(memActualUsed)
+    free.record(memActualFree)
     cached.record(cachedMemory)
-    total.record(mem.getTotal)
-    swapUsed.record(swap.getUsed)
-    swapFree.record(swap.getFree)
+    total.record(memTotal)
+    swapUsed.record(memSwapUsed)
+    swapFree.record(memSwapFree)
   }
 }
 
 object MemoryMetrics extends SigarMetricRecorderCompanion("memory") {
 
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): MemoryMetrics =
-    new MemoryMetrics(sigar, instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter): MemoryMetrics =
+    new MemoryMetrics(sigar, instrumentFactory, logger)
 }
 
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/NetworkMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/NetworkMetrics.scala
index 30575508..ba9f966f 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/NetworkMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/NetworkMetrics.scala
@@ -16,6 +16,7 @@
 
 package kamon.system.sigar
 
+import akka.event.LoggingAdapter
 import kamon.metric.GenericEntityRecorder
 import kamon.metric.instrument._
 import org.hyperic.sigar.{ NetInterfaceStat, Sigar }
@@ -30,7 +31,9 @@ import scala.util.Try
  *    - rxDropped: Total number of incoming packets dropped.
  *    - txDropped: Total number of outgoing packets dropped.
  */
-class NetworkMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class NetworkMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+  import SigarSafeRunner._
+
   val receivedBytes = DiffRecordingHistogram(histogram("rx-bytes", Memory.Bytes))
   val transmittedBytes = DiffRecordingHistogram(histogram("tx-bytes", Memory.Bytes))
   val receiveErrors = DiffRecordingHistogram(histogram("rx-errors"))
@@ -38,7 +41,7 @@ class NetworkMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends
   val receiveDrops = DiffRecordingHistogram(histogram("rx-dropped"))
   val transmitDrops = DiffRecordingHistogram(histogram("tx-dropped"))
 
-  val interfaces = sigar.getNetInterfaceList.toList.filter(_ != "lo")
+  val interfaces = runSafe(sigar.getNetInterfaceList.toList.filter(_ != "lo"), List.empty[String], "network", logger)
 
   def sumOfAllInterfaces(sigar: Sigar, thunk: NetInterfaceStat ⇒ Long): Long = Try {
     interfaces.map(i ⇒ thunk(sigar.getNetInterfaceStat(i))).fold(0L)(_ + _)
@@ -56,6 +59,6 @@ class NetworkMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends
 }
 
 object NetworkMetrics extends SigarMetricRecorderCompanion("network") {
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): NetworkMetrics =
-    new NetworkMetrics(sigar, instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter): NetworkMetrics =
+    new NetworkMetrics(sigar, instrumentFactory, logger)
 }
\ No newline at end of file
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/ProcessCpuMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/ProcessCpuMetrics.scala
index 43b6ba83..1283c07d 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/ProcessCpuMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/ProcessCpuMetrics.scala
@@ -16,6 +16,7 @@
 
 package kamon.system.sigar
 
+import akka.event.LoggingAdapter
 import kamon.metric.GenericEntityRecorder
 import kamon.metric.instrument.InstrumentFactory
 import org.hyperic.sigar.{ ProcCpu, Sigar }
@@ -28,7 +29,8 @@ import scala.util.Try
  *    - total: Process cpu time (sum of User and Sys).
  *    - system: Process cpu kernel time.
  */
-class ProcessCpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class ProcessCpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+
   val processUserCpu = histogram("process-user-cpu")
   val processSystemCpu = histogram("process-system-cpu")
   val processTotalCpu = histogram("process-cpu")
@@ -74,6 +76,6 @@ class ProcessCpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) exte
 }
 
 object ProcessCpuMetrics extends SigarMetricRecorderCompanion("process-cpu") {
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): ProcessCpuMetrics =
-    new ProcessCpuMetrics(sigar, instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter): ProcessCpuMetrics =
+    new ProcessCpuMetrics(sigar, instrumentFactory, logger)
 }
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/SigarMetricsUpdater.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/SigarMetricsUpdater.scala
index 5e5f7518..69bc00ec 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/SigarMetricsUpdater.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/SigarMetricsUpdater.scala
@@ -17,6 +17,7 @@
 package kamon.system.sigar
 
 import akka.actor.{ Props, Actor }
+import akka.event.{ Logging, NoLogging, LoggingAdapter }
 import kamon.Kamon
 import kamon.metric.instrument.InstrumentFactory
 import kamon.metric._
@@ -28,14 +29,15 @@ import scala.concurrent.duration.FiniteDuration
 class SigarMetricsUpdater(refreshInterval: FiniteDuration) extends Actor {
   val sigar = new Sigar
   val metricsExtension = Kamon.metrics
+  val logger = Logging(context.system, this)
 
   val sigarMetrics = List(
-    CpuMetrics.register(sigar, metricsExtension),
-    FileSystemMetrics.register(sigar, metricsExtension),
-    LoadAverageMetrics.register(sigar, metricsExtension),
-    MemoryMetrics.register(sigar, metricsExtension),
-    NetworkMetrics.register(sigar, metricsExtension),
-    ProcessCpuMetrics.register(sigar, metricsExtension))
+    CpuMetrics.register(sigar, metricsExtension, logger),
+    FileSystemMetrics.register(sigar, metricsExtension, logger),
+    LoadAverageMetrics.register(sigar, metricsExtension, logger),
+    MemoryMetrics.register(sigar, metricsExtension, logger),
+    NetworkMetrics.register(sigar, metricsExtension, logger),
+    ProcessCpuMetrics.register(sigar, metricsExtension, logger))
 
   val refreshSchedule = context.system.scheduler.schedule(refreshInterval, refreshInterval, self, UpdateSigarMetrics)(context.dispatcher)
 
@@ -55,7 +57,7 @@ class SigarMetricsUpdater(refreshInterval: FiniteDuration) extends Actor {
 
 object SigarMetricsUpdater {
   def props(refreshInterval: FiniteDuration): Props =
-    Props(new SigarMetricsUpdater((refreshInterval)))
+    Props(new SigarMetricsUpdater(refreshInterval))
 
   case object UpdateSigarMetrics
 }
@@ -64,10 +66,24 @@ trait SigarMetric extends EntityRecorder {
   def update(): Unit
 }
 
+object SigarSafeRunner {
+  private val errorLogged = scala.collection.mutable.Set[String]()
+
+  def runSafe[T](thunk: ⇒ T, defaultValue: ⇒ T, error: String, logger: LoggingAdapter): T = {
+    try thunk catch {
+      case e: Exception ⇒
+        if (!errorLogged.contains(error)) {
+          errorLogged += error
+          logger.warning("Couldn't get the metric [{}]. Due to [{}]", error, e.getMessage)
+        }
+        defaultValue
+    }
+  }
+}
+
 abstract class SigarMetricRecorderCompanion(metricName: String) {
-  def register(sigar: Sigar, metricsExtension: MetricsModule): SigarMetric =
+  def register(sigar: Sigar, metricsExtension: MetricsModule, logger: LoggingAdapter = NoLogging): SigarMetric =
     metricsExtension.entity(EntityRecorderFactory("system-metric", apply(sigar, _)), metricName)
 
-  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): SigarMetric
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter = NoLogging): SigarMetric
 }
-