public virtual void TestIsInSafemode()
{
// Check for the standby nn without client failover.
NameNode nn2 = cluster.GetNameNode(1);
NUnit.Framework.Assert.IsTrue("nn2 should be in standby state", nn2.IsStandbyState
());
IPEndPoint nameNodeAddress = nn2.GetNameNodeAddress();
Configuration conf = new Configuration();
DistributedFileSystem dfs = new DistributedFileSystem();
try
{
dfs.Initialize(URI.Create("hdfs://" + nameNodeAddress.GetHostName() + ":" + nameNodeAddress
.Port), conf);
dfs.IsInSafeMode();
NUnit.Framework.Assert.Fail("StandBy should throw exception for isInSafeMode");
}
catch (IOException e)
{
if (e is RemoteException)
{
IOException sbExcpetion = ((RemoteException)e).UnwrapRemoteException();
NUnit.Framework.Assert.IsTrue("StandBy nn should not support isInSafeMode", sbExcpetion
is StandbyException);
}
else
{
throw;
}
}
finally
{
if (null != dfs)
{
dfs.Close();
}
}
// Check with Client FailOver
cluster.TransitionToStandby(0);
cluster.TransitionToActive(1);
cluster.GetNameNodeRpc(1).SetSafeMode(HdfsConstants.SafeModeAction.SafemodeEnter,
false);
DistributedFileSystem dfsWithFailOver = (DistributedFileSystem)fs;
NUnit.Framework.Assert.IsTrue("ANN should be in SafeMode", dfsWithFailOver.IsInSafeMode
());
cluster.GetNameNodeRpc(1).SetSafeMode(HdfsConstants.SafeModeAction.SafemodeLeave,
false);
NUnit.Framework.Assert.IsFalse("ANN should be out of SafeMode", dfsWithFailOver.IsInSafeMode
());
}
/*
* Tests some utility methods that surround the SafeMode's state.
* @throws IOException when there's an issue connecting to the test DFS.
*/
/// <exception cref="System.IO.IOException"/>
public virtual void TestSafeModeUtils()
{
dfs = cluster.GetFileSystem();
// Enter safemode.
dfs.SetSafeMode(HdfsConstants.SafeModeAction.SafemodeEnter);
NUnit.Framework.Assert.IsTrue("State was expected to be in safemode.", dfs.IsInSafeMode
());
// Exit safemode.
dfs.SetSafeMode(HdfsConstants.SafeModeAction.SafemodeLeave);
NUnit.Framework.Assert.IsFalse("State was expected to be out of safemode.", dfs.IsInSafeMode
());
}
/// <exception cref="System.IO.IOException"/>
private void VerifyNNIsInSafeMode(DistributedFileSystem dfs)
{
while (true)
{
try
{
if (dfs.IsInSafeMode())
{
return;
}
else
{
throw new IOException("Expected to be in SafeMode");
}
}
catch (IOException)
{
}
}
}