/// <exception cref="System.IO.IOException"/>
private void CorruptBlock(MiniDFSCluster cluster, FileSystem fs, Path fileName, int
dnIndex, ExtendedBlock block)
{
// corrupt the block on datanode dnIndex
// the indexes change once the nodes are restarted.
// But the datadirectory will not change
NUnit.Framework.Assert.IsTrue(cluster.CorruptReplica(dnIndex, block));
MiniDFSCluster.DataNodeProperties dnProps = cluster.StopDataNode(0);
// Each datanode has multiple data dirs, check each
for (int dirIndex = 0; dirIndex < 2; dirIndex++)
{
string bpid = cluster.GetNamesystem().GetBlockPoolId();
FilePath storageDir = cluster.GetStorageDir(dnIndex, dirIndex);
FilePath dataDir = MiniDFSCluster.GetFinalizedDir(storageDir, bpid);
FilePath scanLogFile = new FilePath(dataDir, "dncp_block_verification.log.curr");
if (scanLogFile.Exists())
{
// wait for one minute for deletion to succeed;
for (int i = 0; !scanLogFile.Delete(); i++)
{
NUnit.Framework.Assert.IsTrue("Could not delete log file in one minute", i < 60);
try
{
Sharpen.Thread.Sleep(1000);
}
catch (Exception)
{
}
}
}
}
// restart the detained so the corrupt replica will be detected
cluster.RestartDataNode(dnProps);
}