/// <exception cref="System.IO.IOException"/>
private long GetCommittedTxnIdValue(MiniQJMHACluster qjCluster)
{
Journal journal1 = qjCluster.GetJournalCluster().GetJournalNode(0).GetOrCreateJournal
(MiniQJMHACluster.Nameservice);
BestEffortLongFile committedTxnId = (BestEffortLongFile)Whitebox.GetInternalState
(journal1, "committedTxnId");
return(committedTxnId != null?committedTxnId.Get() : HdfsConstants.InvalidTxid);
}
/// <exception cref="System.IO.IOException"/>
private static void CheckJnPreviousDirExistence(MiniQJMHACluster jnCluster, bool
shouldExist)
{
for (int i = 0; i < 3; i++)
{
CheckPreviousDirExistence(jnCluster.GetJournalCluster().GetJournalDir(i, "ns1"),
shouldExist);
}
if (shouldExist)
{
AssertEpochFilesCopied(jnCluster);
}
}
/// <exception cref="System.IO.IOException"/>
private static void AssertEpochFilesCopied(MiniQJMHACluster jnCluster)
{
for (int i = 0; i < 3; i++)
{
FilePath journalDir = jnCluster.GetJournalCluster().GetJournalDir(i, "ns1");
FilePath currDir = new FilePath(journalDir, "current");
FilePath prevDir = new FilePath(journalDir, "previous");
foreach (string fileName in new string[] { Journal.LastPromisedFilename, Journal.
LastWriterEpoch })
{
FilePath prevFile = new FilePath(prevDir, fileName);
// Possible the prev file doesn't exist, e.g. if there has never been a
// writer before the upgrade.
if (prevFile.Exists())
{
PersistentLongFile prevLongFile = new PersistentLongFile(prevFile, -10);
PersistentLongFile currLongFile = new PersistentLongFile(new FilePath(currDir, fileName
), -11);
NUnit.Framework.Assert.IsTrue("Value in " + fileName + " has decreased on upgrade in "
+ journalDir, prevLongFile.Get() <= currLongFile.Get());
}
}
}
}