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Posted to commits@flink.apache.org by ch...@apache.org on 2016/06/15 12:04:54 UTC

[2/3] flink git commit: [FLINK-4032] Replace all usage of Guava Preconditions

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
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diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
index 3b7a2a6..2d7097d 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
@@ -28,7 +28,7 @@ import org.slf4j.LoggerFactory;
 
 import java.util.ArrayDeque;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A pipelined in-memory only subpartition, which can be consumed once.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartitionView.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartitionView.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartitionView.java
index 51f1eab..86c241c 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartitionView.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartitionView.java
@@ -23,7 +23,7 @@ import org.apache.flink.runtime.util.event.NotificationListener;
 
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * View over a pipelined in-memory only subpartition.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java
index 189ee62..0068fe0 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java
@@ -37,10 +37,10 @@ import java.io.IOException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkElementIndex;
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkElementIndex;
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
 
 /**
  * A result partition for data produced by a single task.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartitionManager.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartitionManager.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartitionManager.java
index 4063c1c..9da3e14 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartitionManager.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartitionManager.java
@@ -30,7 +30,7 @@ import org.slf4j.LoggerFactory;
 import java.io.IOException;
 import java.util.Map;
 
-import static com.google.common.base.Preconditions.checkState;
+import static org.apache.flink.util.Preconditions.checkState;
 
 /**
  * The result partition manager keeps track of all currently produced/consumed partitions of a

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartition.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartition.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartition.java
index 21e9cc6..556f1d2 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartition.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartition.java
@@ -31,7 +31,7 @@ import org.slf4j.LoggerFactory;
 import java.io.IOException;
 import java.util.ArrayList;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A blocking in-memory subpartition, which is able to spill to disk.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartitionView.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartitionView.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartitionView.java
index c9da40a..39427cf 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartitionView.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartitionView.java
@@ -26,8 +26,8 @@ import org.apache.flink.runtime.util.event.NotificationListener;
 import java.io.IOException;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 class SpillableSubpartitionView implements ResultSubpartitionView {
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewAsyncIO.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewAsyncIO.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewAsyncIO.java
index 052a7cd..d63f7d5 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewAsyncIO.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewAsyncIO.java
@@ -31,8 +31,8 @@ import java.io.IOException;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * View over a spilled subpartition.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewSyncIO.java
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diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewSyncIO.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewSyncIO.java
index 2c0c744..927d1e9 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewSyncIO.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/SpilledSubpartitionViewSyncIO.java
@@ -32,8 +32,8 @@ import java.util.ArrayDeque;
 import java.util.Queue;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * View over a spilled subpartition.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/BufferOrEvent.java
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diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/BufferOrEvent.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/BufferOrEvent.java
index 55e5767..885e738 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/BufferOrEvent.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/BufferOrEvent.java
@@ -21,8 +21,8 @@ package org.apache.flink.runtime.io.network.partition.consumer;
 import org.apache.flink.runtime.event.AbstractEvent;
 import org.apache.flink.runtime.io.network.buffer.Buffer;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * Either type for {@link Buffer} or {@link AbstractEvent} instances tagged with the channel index,

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/InputChannel.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/InputChannel.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/InputChannel.java
index d282db5..e6e078d 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/InputChannel.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/InputChannel.java
@@ -28,8 +28,8 @@ import scala.Tuple2;
 import java.io.IOException;
 import java.util.concurrent.atomic.AtomicReference;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * An input channel consumes a single {@link ResultSubpartitionView}.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
index ff12153..92b6d1f 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
@@ -37,8 +37,8 @@ import java.io.IOException;
 import java.util.Timer;
 import java.util.TimerTask;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
 
 /**
  * An input channel, which requests a local subpartition.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
index be2509f..814e961 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
@@ -35,8 +35,8 @@ import java.util.ArrayDeque;
 import java.util.Queue;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
 
 /**
  * An input channel, which requests a remote partition queue.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java
index bf8bc73..81d202a 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java
@@ -52,9 +52,9 @@ import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
 
 /**
  * An input gate consumes one or more partitions of a single produced intermediate result.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnionInputGate.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnionInputGate.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnionInputGate.java
index 5599687..b1b8911 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnionInputGate.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnionInputGate.java
@@ -32,8 +32,8 @@ import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.LinkedBlockingQueue;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * Input gate wrapper to union the input from multiple input gates.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnknownInputChannel.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnknownInputChannel.java b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnknownInputChannel.java
index cdf28be..015f3fa 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnknownInputChannel.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnknownInputChannel.java
@@ -30,7 +30,7 @@ import scala.Tuple2;
 
 import java.io.IOException;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * An input channel place holder to be replaced by either a {@link RemoteInputChannel}

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/IterationSynchronizationSinkTask.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/IterationSynchronizationSinkTask.java b/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/IterationSynchronizationSinkTask.java
index f1ab93f..66fb45b 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/IterationSynchronizationSinkTask.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/IterationSynchronizationSinkTask.java
@@ -39,8 +39,7 @@ import org.apache.flink.runtime.iterative.event.WorkerDoneEvent;
 import org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable;
 import org.apache.flink.runtime.operators.util.TaskConfig;
 import org.apache.flink.types.Value;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 /**
  * The task responsible for synchronizing all iteration heads, implemented as an output task. This task

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/SyncEventHandler.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/SyncEventHandler.java b/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/SyncEventHandler.java
index d7549d1..71c15b1 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/SyncEventHandler.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/iterative/task/SyncEventHandler.java
@@ -25,8 +25,7 @@ import org.apache.flink.runtime.event.TaskEvent;
 import org.apache.flink.runtime.util.event.EventListener;
 import org.apache.flink.runtime.iterative.event.WorkerDoneEvent;
 import org.apache.flink.types.Value;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 public class SyncEventHandler implements EventListener<TaskEvent> {
 	

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/IntermediateDataSet.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/IntermediateDataSet.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/IntermediateDataSet.java
index 1a14ed5..c30c78e 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/IntermediateDataSet.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/IntermediateDataSet.java
@@ -23,7 +23,7 @@ import org.apache.flink.runtime.io.network.partition.ResultPartitionType;
 import java.util.ArrayList;
 import java.util.List;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * An intermediate data set is the data set produced by an operator - either a

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/JobVertex.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/JobVertex.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/JobVertex.java
index acb22aa..379a42a 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/JobVertex.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/JobVertex.java
@@ -29,8 +29,7 @@ import org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable;
 import org.apache.flink.runtime.jobgraph.tasks.StoppableTask;
 import org.apache.flink.runtime.jobmanager.scheduler.CoLocationGroup;
 import org.apache.flink.runtime.jobmanager.scheduler.SlotSharingGroup;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 /**
  * The base class for job vertexes.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/JobManagerCliOptions.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/JobManagerCliOptions.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/JobManagerCliOptions.java
index 437693e..3598a29 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/JobManagerCliOptions.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/JobManagerCliOptions.java
@@ -18,7 +18,7 @@
 
 package org.apache.flink.runtime.jobmanager;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * The command line parameters passed to the TaskManager.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/SubmittedJobGraph.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/SubmittedJobGraph.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/SubmittedJobGraph.java
index 48da3b8..faacc93 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/SubmittedJobGraph.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/SubmittedJobGraph.java
@@ -23,7 +23,7 @@ import org.apache.flink.runtime.jobgraph.JobGraph;
 
 import java.io.Serializable;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A recoverable {@link JobGraph} and {@link JobInfo}.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/ZooKeeperSubmittedJobGraphStore.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/ZooKeeperSubmittedJobGraphStore.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/ZooKeeperSubmittedJobGraphStore.java
index b0a2eba..128db83 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/ZooKeeperSubmittedJobGraphStore.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/ZooKeeperSubmittedJobGraphStore.java
@@ -40,8 +40,8 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
 
 /**
  * {@link SubmittedJobGraph} instances for JobManagers running in {@link RecoveryMode#ZOOKEEPER}.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationConstraint.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationConstraint.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationConstraint.java
index 9ff56a4..fece894 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationConstraint.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationConstraint.java
@@ -21,7 +21,7 @@ package org.apache.flink.runtime.jobmanager.scheduler;
 import org.apache.flink.util.AbstractID;
 import org.apache.flink.runtime.instance.Instance;
 
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 import org.apache.flink.runtime.instance.SharedSlot;
 
 /**

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationGroup.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationGroup.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationGroup.java
index 74e34e1..35c48e1 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationGroup.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/CoLocationGroup.java
@@ -21,10 +21,9 @@ package org.apache.flink.runtime.jobmanager.scheduler;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.flink.util.AbstractID;
 import org.apache.flink.runtime.jobgraph.JobVertex;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.AbstractID;
+import org.apache.flink.util.Preconditions;
 
 /**
  * A Co-location group is a group of JobVertices, where the <i>i-th</i> subtask of one vertex

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/ScheduledUnit.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/ScheduledUnit.java b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/ScheduledUnit.java
index d767d62..7348c9d 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/ScheduledUnit.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/jobmanager/scheduler/ScheduledUnit.java
@@ -20,8 +20,7 @@ package org.apache.flink.runtime.jobmanager.scheduler;
 
 import org.apache.flink.runtime.executiongraph.Execution;
 import org.apache.flink.runtime.jobgraph.JobVertexID;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 public class ScheduledUnit {
 	

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/StandaloneLeaderElectionService.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/StandaloneLeaderElectionService.java b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/StandaloneLeaderElectionService.java
index 1a297db..2d36616 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/StandaloneLeaderElectionService.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/StandaloneLeaderElectionService.java
@@ -18,7 +18,7 @@
 
 package org.apache.flink.runtime.leaderelection;
 
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 import java.util.UUID;
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/ZooKeeperLeaderElectionService.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/ZooKeeperLeaderElectionService.java b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/ZooKeeperLeaderElectionService.java
index d39bf2a..e9aaaf8 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/ZooKeeperLeaderElectionService.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/ZooKeeperLeaderElectionService.java
@@ -18,7 +18,7 @@
 
 package org.apache.flink.runtime.leaderelection;
 
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 import org.apache.curator.framework.CuratorFramework;
 import org.apache.curator.framework.recipes.cache.ChildData;
 import org.apache.curator.framework.recipes.cache.NodeCache;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/StandaloneLeaderRetrievalService.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/StandaloneLeaderRetrievalService.java b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/StandaloneLeaderRetrievalService.java
index 1be879c..26a34aa 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/StandaloneLeaderRetrievalService.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/StandaloneLeaderRetrievalService.java
@@ -18,7 +18,7 @@
 
 package org.apache.flink.runtime.leaderretrieval;
 
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 /**
  * Standalone implementation of the {@link LeaderRetrievalService}. The standalone implementation

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/ZooKeeperLeaderRetrievalService.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/ZooKeeperLeaderRetrievalService.java b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/ZooKeeperLeaderRetrievalService.java
index e2501a3..4587bad 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/ZooKeeperLeaderRetrievalService.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/ZooKeeperLeaderRetrievalService.java
@@ -18,7 +18,7 @@
 
 package org.apache.flink.runtime.leaderretrieval;
 
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 import org.apache.curator.framework.CuratorFramework;
 import org.apache.curator.framework.recipes.cache.ChildData;
 import org.apache.curator.framework.recipes.cache.NodeCache;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobDetails.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobDetails.java b/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobDetails.java
index c5f0c15..31ea516 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobDetails.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobDetails.java
@@ -23,7 +23,7 @@ import org.apache.flink.runtime.jobgraph.JobStatus;
 
 import java.util.Arrays;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * An actor message with a detailed overview of the current status of a job.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobsWithIDsOverview.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobsWithIDsOverview.java b/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobsWithIDsOverview.java
index de24c15..4cb9d8b 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobsWithIDsOverview.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/messages/webmonitor/JobsWithIDsOverview.java
@@ -23,7 +23,7 @@ import org.apache.flink.api.common.JobID;
 import java.util.ArrayList;
 import java.util.List;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * An overview of how many jobs are in which status.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/operators/sort/LargeRecordHandler.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/sort/LargeRecordHandler.java b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/sort/LargeRecordHandler.java
index 518f44c..c10d772 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/sort/LargeRecordHandler.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/sort/LargeRecordHandler.java
@@ -18,8 +18,6 @@
 
 package org.apache.flink.runtime.operators.sort;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkArgument;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -50,6 +48,8 @@ import org.apache.flink.util.MutableObjectIterator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
 
 public class LargeRecordHandler<T> {
 	

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BitSet.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BitSet.java b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BitSet.java
index 6054727..be24ee2 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BitSet.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BitSet.java
@@ -17,8 +17,8 @@
  */
 package org.apache.flink.runtime.operators.util;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.core.memory.MemorySegment;
+import org.apache.flink.util.Preconditions;
 
 public class BitSet {
 	private MemorySegment memorySegment;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BloomFilter.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BloomFilter.java b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BloomFilter.java
index 0ad3c6d..5f09391 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BloomFilter.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/BloomFilter.java
@@ -18,10 +18,9 @@
 
 package org.apache.flink.runtime.operators.util;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.core.memory.MemorySegment;
 
-import static com.google.common.base.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkArgument;
 
 /**
  * BloomFilter is a probabilistic data structure for set membership check. BloomFilters are
@@ -158,8 +157,8 @@ public class BloomFilter {
 		private final int LONG_POSITION_MASK = 0xffffffc0;
 		
 		public BitSet(int byteSize) {
-			Preconditions.checkArgument(byteSize > 0, "bits size should be greater than 0.");
-			Preconditions.checkArgument(byteSize << 29 == 0, "bytes size should be integral multiple of long size(8 Bytes).");
+			checkArgument(byteSize > 0, "bits size should be greater than 0.");
+			checkArgument(byteSize << 29 == 0, "bytes size should be integral multiple of long size(8 Bytes).");
 			this.length = byteSize;
 		}
 		
@@ -223,4 +222,4 @@ public class BloomFilter {
 			return output.toString();
 		}
 	}
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/DistributedRuntimeUDFContext.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/DistributedRuntimeUDFContext.java b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/DistributedRuntimeUDFContext.java
index 6c7f5f3..35c7bab 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/DistributedRuntimeUDFContext.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/operators/util/DistributedRuntimeUDFContext.java
@@ -33,8 +33,7 @@ import org.apache.flink.core.fs.Path;
 import org.apache.flink.metrics.MetricGroup;
 import org.apache.flink.runtime.broadcast.BroadcastVariableMaterialization;
 import org.apache.flink.runtime.broadcast.InitializationTypeConflictException;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 /**
  * A standalone implementation of the {@link RuntimeContext}, created by runtime UDF operators.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/RuntimeEnvironment.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/RuntimeEnvironment.java b/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/RuntimeEnvironment.java
index ee4d31f..3b72730 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/RuntimeEnvironment.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/RuntimeEnvironment.java
@@ -42,7 +42,7 @@ import org.apache.flink.util.SerializedValue;
 import java.util.Map;
 import java.util.concurrent.Future;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * In implementation of the {@link Environment}.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/Task.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/Task.java b/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/Task.java
index 1746f2c..017b16b 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/Task.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/Task.java
@@ -79,7 +79,7 @@ import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * The Task represents one execution of a parallel subtask on a TaskManager.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/util/ProcessShutDownThread.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/util/ProcessShutDownThread.java b/flink-runtime/src/main/java/org/apache/flink/runtime/util/ProcessShutDownThread.java
index ad9e10d..e19cfd7 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/util/ProcessShutDownThread.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/util/ProcessShutDownThread.java
@@ -24,7 +24,7 @@ import scala.concurrent.duration.Duration;
 
 import java.util.concurrent.TimeoutException;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * JVM shut down thread awaiting actor system shut down for a certain amount

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/util/ZooKeeperUtils.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/util/ZooKeeperUtils.java b/flink-runtime/src/main/java/org/apache/flink/runtime/util/ZooKeeperUtils.java
index 4bcc668..280a20e 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/util/ZooKeeperUtils.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/util/ZooKeeperUtils.java
@@ -42,7 +42,7 @@ import org.slf4j.LoggerFactory;
 import java.io.IOException;
 import java.io.Serializable;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 public class ZooKeeperUtils {
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/ZooKeeperStateHandleStore.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/ZooKeeperStateHandleStore.java b/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/ZooKeeperStateHandleStore.java
index 1d89d64..6111f47 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/ZooKeeperStateHandleStore.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/ZooKeeperStateHandleStore.java
@@ -35,7 +35,7 @@ import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * State handles backed by ZooKeeper.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/filesystem/FileSystemStateStorageHelper.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/filesystem/FileSystemStateStorageHelper.java b/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/filesystem/FileSystemStateStorageHelper.java
index bb7d94c..6692ef0 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/filesystem/FileSystemStateStorageHelper.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/filesystem/FileSystemStateStorageHelper.java
@@ -18,13 +18,13 @@
 
 package org.apache.flink.runtime.zookeeper.filesystem;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.core.fs.FSDataOutputStream;
 import org.apache.flink.core.fs.FileSystem;
 import org.apache.flink.core.fs.Path;
 import org.apache.flink.runtime.state.StateHandle;
 import org.apache.flink.runtime.state.filesystem.FileSerializableStateHandle;
 import org.apache.flink.util.FileUtils;
+import org.apache.flink.util.Preconditions;
 import org.apache.flink.runtime.zookeeper.StateStorageHelper;
 
 import java.io.IOException;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java
index f8cd28f..70faf22 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java
@@ -43,7 +43,7 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/CancelPartitionRequestTest.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/CancelPartitionRequestTest.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/CancelPartitionRequestTest.java
index eb0d772..1ff1e99 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/CancelPartitionRequestTest.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/CancelPartitionRequestTest.java
@@ -37,12 +37,12 @@ import java.io.IOException;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
-import static com.google.common.base.Preconditions.checkNotNull;
 import static org.apache.flink.runtime.io.network.netty.NettyMessage.CancelPartitionRequest;
 import static org.apache.flink.runtime.io.network.netty.NettyMessage.PartitionRequest;
 import static org.apache.flink.runtime.io.network.netty.NettyTestUtil.connect;
 import static org.apache.flink.runtime.io.network.netty.NettyTestUtil.initServerAndClient;
 import static org.apache.flink.runtime.io.network.netty.NettyTestUtil.shutdown;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 import static org.junit.Assert.fail;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.eq;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyTestUtil.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyTestUtil.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyTestUtil.java
index 00e8ace..119a3d0 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyTestUtil.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyTestUtil.java
@@ -29,8 +29,8 @@ import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.util.concurrent.TimeUnit;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * Test utility for Netty server and client setup.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannelTest.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannelTest.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannelTest.java
index d4fcf16..8852b4f 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannelTest.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannelTest.java
@@ -58,8 +58,8 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 
-import static com.google.common.base.Preconditions.checkArgument;
 import static org.apache.flink.runtime.io.disk.iomanager.IOManager.IOMode.ASYNC;
+import static org.apache.flink.util.Preconditions.checkArgument;
 import static org.junit.Assert.fail;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyInt;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestInputChannel.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestInputChannel.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestInputChannel.java
index 3dafffd..7ea67b3 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestInputChannel.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestInputChannel.java
@@ -31,8 +31,8 @@ import org.mockito.stubbing.OngoingStubbing;
 
 import java.io.IOException;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestSingleInputGate.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestSingleInputGate.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestSingleInputGate.java
index 1149000..640c11a 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestSingleInputGate.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/consumer/TestSingleInputGate.java
@@ -35,8 +35,8 @@ import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.BlockingQueue;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkElementIndex;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkElementIndex;
 import static org.mockito.Matchers.any;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestBufferFactory.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestBufferFactory.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestBufferFactory.java
index 4b3b465..89ee683 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestBufferFactory.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestBufferFactory.java
@@ -27,8 +27,8 @@ import org.apache.flink.runtime.testutils.DiscardingRecycler;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 public class TestBufferFactory {
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPartitionProducer.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPartitionProducer.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPartitionProducer.java
index d6dd9ee..e694dfe 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPartitionProducer.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPartitionProducer.java
@@ -26,7 +26,7 @@ import org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent;
 import java.util.Random;
 import java.util.concurrent.Callable;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A test partition producer.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPooledBufferProvider.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPooledBufferProvider.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPooledBufferProvider.java
index 4893360..339b6f4 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPooledBufferProvider.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestPooledBufferProvider.java
@@ -30,7 +30,7 @@ import java.util.Queue;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.ConcurrentLinkedQueue;
 
-import static com.google.common.base.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkArgument;
 
 public class TestPooledBufferProvider implements BufferProvider {
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionConsumer.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionConsumer.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionConsumer.java
index 18e0d4a..1b51805 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionConsumer.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionConsumer.java
@@ -27,7 +27,7 @@ import org.apache.flink.runtime.io.network.partition.ResultSubpartitionView;
 import java.util.Random;
 import java.util.concurrent.Callable;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A test subpartition view consumer.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionProducer.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionProducer.java b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionProducer.java
index e5312ce..98dc1c7 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionProducer.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/io/network/util/TestSubpartitionProducer.java
@@ -26,7 +26,7 @@ import org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent;
 import java.util.Random;
 import java.util.concurrent.Callable;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A test subpartition producer.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/iterative/concurrent/BrokerTest.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/iterative/concurrent/BrokerTest.java b/flink-runtime/src/test/java/org/apache/flink/runtime/iterative/concurrent/BrokerTest.java
index e6fb374..3f2c243 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/iterative/concurrent/BrokerTest.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/iterative/concurrent/BrokerTest.java
@@ -19,10 +19,11 @@
 
 package org.apache.flink.runtime.iterative.concurrent;
 
-import com.google.common.base.Preconditions;
 import com.google.common.collect.Lists;
 import org.junit.Test;
 
+import org.apache.flink.util.Preconditions;
+
 import java.util.Collections;
 import java.util.List;
 import java.util.Random;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/taskmanager/TaskCancelTest.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/taskmanager/TaskCancelTest.java b/flink-runtime/src/test/java/org/apache/flink/runtime/taskmanager/TaskCancelTest.java
index fc5a4a3..690c042 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/taskmanager/TaskCancelTest.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/taskmanager/TaskCancelTest.java
@@ -47,10 +47,10 @@ import scala.concurrent.Await;
 import scala.concurrent.Future;
 import scala.concurrent.duration.FiniteDuration;
 
-import static com.google.common.base.Preconditions.checkNotNull;
 import static org.apache.flink.runtime.messages.JobManagerMessages.CancelJob;
 import static org.apache.flink.runtime.messages.JobManagerMessages.CancellationFailure;
 import static org.apache.flink.runtime.messages.JobManagerMessages.RequestJobStatus;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 public class TaskCancelTest {
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerActorTestUtils.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerActorTestUtils.java b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerActorTestUtils.java
index 66e1d9b..360cb1f 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerActorTestUtils.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerActorTestUtils.java
@@ -29,12 +29,12 @@ import scala.concurrent.Future;
 import scala.concurrent.duration.Deadline;
 import scala.concurrent.duration.FiniteDuration;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
 import static org.apache.flink.runtime.messages.JobManagerMessages.JobNotFound;
 import static org.apache.flink.runtime.messages.JobManagerMessages.RequestJobStatus;
 import static org.apache.flink.runtime.messages.JobManagerMessages.getRequestJobStatus;
 import static org.apache.flink.runtime.messages.JobManagerMessages.getRequestNumberRegisteredTaskManager;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * JobManager actor test utilities.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerProcess.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerProcess.java b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerProcess.java
index 81aedfb..fac6162 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerProcess.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/JobManagerProcess.java
@@ -38,8 +38,8 @@ import java.util.concurrent.CountDownLatch;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A {@link JobManager} instance running in a separate JVM.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TaskManagerProcess.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TaskManagerProcess.java b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TaskManagerProcess.java
index dfaed37..97e7cca 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TaskManagerProcess.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TaskManagerProcess.java
@@ -30,8 +30,8 @@ import java.util.ArrayList;
 import java.util.Map;
 import java.util.concurrent.CountDownLatch;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A {@link TaskManager} instance running in a separate JVM.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TestJvmProcess.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TestJvmProcess.java b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TestJvmProcess.java
index a101b1a..73a0088 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TestJvmProcess.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/TestJvmProcess.java
@@ -28,11 +28,11 @@ import java.io.IOException;
 import java.io.StringWriter;
 import java.util.Arrays;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
 import static org.apache.flink.runtime.testutils.CommonTestUtils.createTemporaryLog4JProperties;
 import static org.apache.flink.runtime.testutils.CommonTestUtils.getCurrentClasspath;
 import static org.apache.flink.runtime.testutils.CommonTestUtils.getJavaCommandPath;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 import static org.junit.Assert.fail;
 
 /**

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/ZooKeeperTestUtils.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/ZooKeeperTestUtils.java b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/ZooKeeperTestUtils.java
index da3c02d..2796337 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/ZooKeeperTestUtils.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/testutils/ZooKeeperTestUtils.java
@@ -23,7 +23,7 @@ import org.apache.flink.configuration.Configuration;
 import org.apache.flink.runtime.jobmanager.RecoveryMode;
 import org.apache.flink.runtime.state.filesystem.FsStateBackendFactory;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * ZooKeeper test utilities.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-scala/src/main/java/org/apache/flink/api/scala/operators/ScalaAggregateOperator.java
----------------------------------------------------------------------
diff --git a/flink-scala/src/main/java/org/apache/flink/api/scala/operators/ScalaAggregateOperator.java b/flink-scala/src/main/java/org/apache/flink/api/scala/operators/ScalaAggregateOperator.java
index 292ffcf..80e91ac 100644
--- a/flink-scala/src/main/java/org/apache/flink/api/scala/operators/ScalaAggregateOperator.java
+++ b/flink-scala/src/main/java/org/apache/flink/api/scala/operators/ScalaAggregateOperator.java
@@ -42,8 +42,8 @@ import org.apache.flink.api.java.typeutils.TupleTypeInfoBase;
 import org.apache.flink.api.java.typeutils.runtime.TupleSerializerBase;
 import org.apache.flink.configuration.Configuration;
 import org.apache.flink.util.Collector;
+import org.apache.flink.util.Preconditions;
 
-import com.google.common.base.Preconditions;
 import scala.Product;
 
 /**

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-scala/src/main/scala/org/apache/flink/api/scala/ExecutionEnvironment.scala
----------------------------------------------------------------------
diff --git a/flink-scala/src/main/scala/org/apache/flink/api/scala/ExecutionEnvironment.scala b/flink-scala/src/main/scala/org/apache/flink/api/scala/ExecutionEnvironment.scala
index 5c923cb..4475bc8 100644
--- a/flink-scala/src/main/scala/org/apache/flink/api/scala/ExecutionEnvironment.scala
+++ b/flink-scala/src/main/scala/org/apache/flink/api/scala/ExecutionEnvironment.scala
@@ -18,7 +18,6 @@
 package org.apache.flink.api.scala
 
 import com.esotericsoftware.kryo.Serializer
-import com.google.common.base.Preconditions
 import org.apache.flink.annotation.{PublicEvolving, Public}
 import org.apache.flink.api.common.io.{FileInputFormat, InputFormat}
 import org.apache.flink.api.common.restartstrategy.RestartStrategies.RestartStrategyConfiguration
@@ -34,7 +33,7 @@ import org.apache.flink.api.scala.hadoop.{mapred, mapreduce}
 import org.apache.flink.configuration.Configuration
 import org.apache.flink.core.fs.Path
 import org.apache.flink.types.StringValue
-import org.apache.flink.util.{NumberSequenceIterator, SplittableIterator}
+import org.apache.flink.util.{NumberSequenceIterator, Preconditions, SplittableIterator}
 import org.apache.hadoop.fs.{Path => HadoopPath}
 import org.apache.hadoop.mapred.{FileInputFormat => MapredFileInputFormat, InputFormat => MapredInputFormat, JobConf}
 import org.apache.hadoop.mapreduce.lib.input.{FileInputFormat => MapreduceFileInputFormat}

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-connectors/flink-connector-elasticsearch2/src/main/java/org/apache/flink/streaming/connectors/elasticsearch2/ElasticsearchSink.java
----------------------------------------------------------------------
diff --git a/flink-streaming-connectors/flink-connector-elasticsearch2/src/main/java/org/apache/flink/streaming/connectors/elasticsearch2/ElasticsearchSink.java b/flink-streaming-connectors/flink-connector-elasticsearch2/src/main/java/org/apache/flink/streaming/connectors/elasticsearch2/ElasticsearchSink.java
index a8a53e5..e839589 100644
--- a/flink-streaming-connectors/flink-connector-elasticsearch2/src/main/java/org/apache/flink/streaming/connectors/elasticsearch2/ElasticsearchSink.java
+++ b/flink-streaming-connectors/flink-connector-elasticsearch2/src/main/java/org/apache/flink/streaming/connectors/elasticsearch2/ElasticsearchSink.java
@@ -16,11 +16,11 @@
  */
 package org.apache.flink.streaming.connectors.elasticsearch2;
 
-import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import org.apache.flink.api.java.utils.ParameterTool;
 import org.apache.flink.configuration.Configuration;
 import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;
+import org.apache.flink.util.Preconditions;
 import org.elasticsearch.action.bulk.BulkItemResponse;
 import org.elasticsearch.action.bulk.BulkProcessor;
 import org.elasticsearch.action.bulk.BulkRequest;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-connectors/flink-connector-rabbitmq/pom.xml
----------------------------------------------------------------------
diff --git a/flink-streaming-connectors/flink-connector-rabbitmq/pom.xml b/flink-streaming-connectors/flink-connector-rabbitmq/pom.xml
index 55bbadb..4413c69 100644
--- a/flink-streaming-connectors/flink-connector-rabbitmq/pom.xml
+++ b/flink-streaming-connectors/flink-connector-rabbitmq/pom.xml
@@ -55,12 +55,6 @@ under the License.
 			<version>${rabbitmq.version}</version>
 		</dependency>
 
-		<dependency>
-			<groupId>com.google.guava</groupId>
-			<artifactId>guava</artifactId>
-			<version>${guava.version}</version>
-		</dependency>
-
 	</dependencies>
 
 </project>

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/RMQSource.java
----------------------------------------------------------------------
diff --git a/flink-streaming-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/RMQSource.java b/flink-streaming-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/RMQSource.java
index 20a8b0b..0892d61 100644
--- a/flink-streaming-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/RMQSource.java
+++ b/flink-streaming-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/RMQSource.java
@@ -20,7 +20,6 @@ package org.apache.flink.streaming.connectors.rabbitmq;
 import java.io.IOException;
 import java.util.List;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.api.common.functions.RuntimeContext;
 import org.apache.flink.api.common.typeinfo.TypeInformation;
 import org.apache.flink.api.java.typeutils.ResultTypeQueryable;
@@ -30,6 +29,7 @@ import org.apache.flink.streaming.api.functions.source.MultipleIdsMessageAcknowl
 import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
 import org.apache.flink.streaming.connectors.rabbitmq.common.RMQConnectionConfig;
 import org.apache.flink.streaming.util.serialization.DeserializationSchema;
+import org.apache.flink.util.Preconditions;
 
 import com.rabbitmq.client.Channel;
 import com.rabbitmq.client.Connection;

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/DataStream.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/DataStream.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/DataStream.java
index 69ed878..859b962 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/DataStream.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/DataStream.java
@@ -92,8 +92,7 @@ import org.apache.flink.streaming.runtime.partitioner.ShufflePartitioner;
 import org.apache.flink.streaming.runtime.partitioner.StreamPartitioner;
 import org.apache.flink.streaming.util.keys.KeySelectorUtil;
 import org.apache.flink.streaming.util.serialization.SerializationSchema;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 /**
  * A DataStream represents a stream of elements of the same type. A DataStream

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/StreamProjection.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/StreamProjection.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/StreamProjection.java
index 0392aa4..8537318 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/StreamProjection.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/StreamProjection.java
@@ -47,8 +47,7 @@ import org.apache.flink.api.java.tuple.Tuple8;
 import org.apache.flink.api.java.tuple.Tuple9;
 import org.apache.flink.api.java.typeutils.TupleTypeInfo;
 import org.apache.flink.streaming.api.operators.StreamProject;
-
-import com.google.common.base.Preconditions;
+import org.apache.flink.util.Preconditions;
 
 @PublicEvolving
 public class StreamProjection<IN> {

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamContextEnvironment.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamContextEnvironment.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamContextEnvironment.java
index c0f3a4a..5999143 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamContextEnvironment.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamContextEnvironment.java
@@ -17,7 +17,6 @@
 
 package org.apache.flink.streaming.api.environment;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.annotation.PublicEvolving;
 import org.apache.flink.api.common.JobExecutionResult;
 import org.apache.flink.client.program.ContextEnvironment;
@@ -26,6 +25,8 @@ import org.apache.flink.client.program.DetachedEnvironment;
 import org.apache.flink.configuration.ConfigConstants;
 import org.apache.flink.configuration.GlobalConfiguration;
 import org.apache.flink.streaming.api.graph.StreamGraph;
+import org.apache.flink.util.Preconditions;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
index 1cd052c..d6bfc02 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
@@ -18,7 +18,6 @@
 package org.apache.flink.streaming.api.environment;
 
 import com.esotericsoftware.kryo.Serializer;
-import com.google.common.base.Preconditions;
 
 import org.apache.flink.annotation.PublicEvolving;
 import org.apache.flink.annotation.Internal;
@@ -72,6 +71,7 @@ import org.apache.flink.streaming.api.operators.StoppableStreamSource;
 import org.apache.flink.streaming.api.operators.StreamSource;
 import org.apache.flink.runtime.state.AbstractStateBackend;
 import org.apache.flink.streaming.api.transformations.StreamTransformation;
+import org.apache.flink.util.Preconditions;
 import org.apache.flink.util.SplittableIterator;
 
 import java.io.IOException;
@@ -82,8 +82,6 @@ import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 
-import static java.util.Objects.requireNonNull;
-
 /**
  * An ExecutionEnvironment for streaming jobs. An instance of it is
  * necessary to construct streaming topologies.
@@ -411,7 +409,7 @@ public abstract class StreamExecutionEnvironment {
 	 */
 	@PublicEvolving
 	public StreamExecutionEnvironment setStateBackend(AbstractStateBackend backend) {
-		this.defaultStateBackend = requireNonNull(backend);
+		this.defaultStateBackend = Preconditions.checkNotNull(backend);
 		return this;
 	}
 
@@ -598,7 +596,7 @@ public abstract class StreamExecutionEnvironment {
 	 */
 	@PublicEvolving
 	public void setStreamTimeCharacteristic(TimeCharacteristic characteristic) {
-		this.timeCharacteristic = requireNonNull(characteristic);
+		this.timeCharacteristic = Preconditions.checkNotNull(characteristic);
 		if (characteristic == TimeCharacteristic.ProcessingTime) {
 			getConfig().setAutoWatermarkInterval(0);
 		} else {

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/sink/SocketClientSink.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/sink/SocketClientSink.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/sink/SocketClientSink.java
index 3424cda..807735d 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/sink/SocketClientSink.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/sink/SocketClientSink.java
@@ -29,8 +29,8 @@ import org.apache.flink.streaming.util.serialization.SerializationSchema;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * Socket client that acts as a streaming sink. The data is sent to a Socket as a byte array.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunction.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunction.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunction.java
index 21e4394..3ae54b6 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunction.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunction.java
@@ -28,8 +28,8 @@ import java.io.InputStreamReader;
 import java.net.InetSocketAddress;
 import java.net.Socket;
 
-import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * A source function that reads strings from a socket. The source will read bytes from the socket stream

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/transformations/StreamTransformation.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/transformations/StreamTransformation.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/transformations/StreamTransformation.java
index 9e61ea0..1d2a1bb 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/transformations/StreamTransformation.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/transformations/StreamTransformation.java
@@ -17,7 +17,6 @@
  */
 package org.apache.flink.streaming.api.transformations;
 
-import com.google.common.base.Preconditions;
 
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.api.common.functions.InvalidTypesException;
@@ -25,6 +24,7 @@ import org.apache.flink.api.common.typeinfo.TypeInformation;
 import org.apache.flink.api.java.typeutils.MissingTypeInfo;
 import org.apache.flink.streaming.api.graph.StreamGraph;
 import org.apache.flink.streaming.api.operators.ChainingStrategy;
+import org.apache.flink.util.Preconditions;
 
 import java.util.Collection;
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/time/Time.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/time/Time.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/time/Time.java
index 7943a23..b97efa2 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/time/Time.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/windowing/time/Time.java
@@ -20,7 +20,7 @@ package org.apache.flink.streaming.api.windowing.time;
 
 import java.util.concurrent.TimeUnit;
 import org.apache.flink.annotation.Public;
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * The definition of a time interval for windowing. The time characteristic referred

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/RecordWriterOutput.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/RecordWriterOutput.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/RecordWriterOutput.java
index a6f4237..c9d579f 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/RecordWriterOutput.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/RecordWriterOutput.java
@@ -31,7 +31,7 @@ import org.apache.flink.streaming.runtime.streamrecord.MultiplexingStreamRecordS
 import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
 import org.apache.flink.streaming.runtime.streamrecord.StreamRecordSerializer;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkNotNull;
 
 /**
  * Implementation of {@link Output} that sends data using a {@link RecordWriter}.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/StreamRecordWriter.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/StreamRecordWriter.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/StreamRecordWriter.java
index 80680ce..f46b366 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/StreamRecordWriter.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/StreamRecordWriter.java
@@ -25,7 +25,7 @@ import org.apache.flink.runtime.io.network.api.writer.ChannelSelector;
 import org.apache.flink.runtime.io.network.api.writer.RecordWriter;
 import org.apache.flink.runtime.io.network.api.writer.ResultPartitionWriter;
 
-import static com.google.common.base.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkArgument;
 
 /**
  * This record writer keeps data in buffers at most for a certain timeout. It spawns a separate thread

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/streamrecord/StreamRecordSerializer.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/streamrecord/StreamRecordSerializer.java b/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/streamrecord/StreamRecordSerializer.java
index d259e05..71b43fe 100644
--- a/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/streamrecord/StreamRecordSerializer.java
+++ b/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/streamrecord/StreamRecordSerializer.java
@@ -20,11 +20,11 @@ package org.apache.flink.streaming.runtime.streamrecord;
 
 import java.io.IOException;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.api.common.typeutils.TypeSerializer;
 import org.apache.flink.core.memory.DataInputView;
 import org.apache.flink.core.memory.DataOutputView;
+import org.apache.flink.util.Preconditions;
 
 /**
  * Serializer for {@link StreamRecord}. This version ignores timestamps and only deals with

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-streaming-java/src/test/java/org/apache/flink/streaming/util/TestStreamEnvironment.java
----------------------------------------------------------------------
diff --git a/flink-streaming-java/src/test/java/org/apache/flink/streaming/util/TestStreamEnvironment.java b/flink-streaming-java/src/test/java/org/apache/flink/streaming/util/TestStreamEnvironment.java
index e44815d..c700102 100644
--- a/flink-streaming-java/src/test/java/org/apache/flink/streaming/util/TestStreamEnvironment.java
+++ b/flink-streaming-java/src/test/java/org/apache/flink/streaming/util/TestStreamEnvironment.java
@@ -18,13 +18,13 @@
 
 package org.apache.flink.streaming.util;
 
-import com.google.common.base.Preconditions;
 import org.apache.flink.api.common.JobExecutionResult;
 import org.apache.flink.runtime.jobgraph.JobGraph;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironmentFactory;
 import org.apache.flink.streaming.api.graph.StreamGraph;
 import org.apache.flink.test.util.ForkableFlinkMiniCluster;
+import org.apache.flink.util.Preconditions;
 
 /**
  * A StreamExecutionEnvironment that executes its jobs on a test cluster.

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-tests/src/test/java/org/apache/flink/test/recovery/ChaosMonkeyITCase.java
----------------------------------------------------------------------
diff --git a/flink-tests/src/test/java/org/apache/flink/test/recovery/ChaosMonkeyITCase.java b/flink-tests/src/test/java/org/apache/flink/test/recovery/ChaosMonkeyITCase.java
index 28bfcbc..e97532c 100644
--- a/flink-tests/src/test/java/org/apache/flink/test/recovery/ChaosMonkeyITCase.java
+++ b/flink-tests/src/test/java/org/apache/flink/test/recovery/ChaosMonkeyITCase.java
@@ -67,7 +67,7 @@ import java.util.Random;
 import java.util.UUID;
 import java.util.concurrent.TimeUnit;
 
-import static com.google.common.base.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkArgument;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 

http://git-wip-us.apache.org/repos/asf/flink/blob/c4bbed9e/flink-tests/src/test/java/org/apache/flink/test/recovery/JobManagerHACheckpointRecoveryITCase.java
----------------------------------------------------------------------
diff --git a/flink-tests/src/test/java/org/apache/flink/test/recovery/JobManagerHACheckpointRecoveryITCase.java b/flink-tests/src/test/java/org/apache/flink/test/recovery/JobManagerHACheckpointRecoveryITCase.java
index b9284dc..262f78a 100644
--- a/flink-tests/src/test/java/org/apache/flink/test/recovery/JobManagerHACheckpointRecoveryITCase.java
+++ b/flink-tests/src/test/java/org/apache/flink/test/recovery/JobManagerHACheckpointRecoveryITCase.java
@@ -69,8 +69,8 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLongArray;
 import java.util.concurrent.atomic.AtomicReference;
 
-import static com.google.common.base.Preconditions.checkArgument;
 import static org.apache.flink.runtime.messages.JobManagerMessages.SubmitJob;
+import static org.apache.flink.util.Preconditions.checkArgument;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;