public virtual void TestEmptyInputStream()
{
ZooKeeper zk = BKJMUtil.ConnectZooKeeper();
BookKeeper bkc = new BookKeeper(new ClientConfiguration(), zk);
try
{
LedgerHandle lh = bkc.CreateLedger(BookKeeper.DigestType.Crc32, Sharpen.Runtime.GetBytesForString
("foobar"));
lh.Close();
EditLogLedgerMetadata metadata = new EditLogLedgerMetadata("/foobar", HdfsConstants
.NamenodeLayoutVersion, lh.GetId(), unchecked ((int)(0x1234)));
try
{
new BookKeeperEditLogInputStream(lh, metadata, -1);
NUnit.Framework.Assert.Fail("Shouldn't get this far, should have thrown");
}
catch (IOException ioe)
{
NUnit.Framework.Assert.IsTrue(ioe.Message.Contains("Invalid first bk entry to read"
));
}
metadata = new EditLogLedgerMetadata("/foobar", HdfsConstants.NamenodeLayoutVersion
, lh.GetId(), unchecked ((int)(0x1234)));
try
{
new BookKeeperEditLogInputStream(lh, metadata, 0);
NUnit.Framework.Assert.Fail("Shouldn't get this far, should have thrown");
}
catch (IOException ioe)
{
NUnit.Framework.Assert.IsTrue(ioe.Message.Contains("Invalid first bk entry to read"
));
}
}
finally
{
bkc.Close();
zk.Close();
}
}
/// <summary>Start a new log segment in a BookKeeper ledger.</summary>
/// <remarks>
/// Start a new log segment in a BookKeeper ledger.
/// First ensure that we have the write lock for this journal.
/// Then create a ledger and stream based on that ledger.
/// The ledger id is written to the inprogress znode, so that in the
/// case of a crash, a recovery process can find the ledger we were writing
/// to when we crashed.
/// </remarks>
/// <param name="txId">First transaction id to be written to the stream</param>
/// <exception cref="System.IO.IOException"/>
public override EditLogOutputStream StartLogSegment(long txId, int layoutVersion)
{
CheckEnv();
if (txId <= maxTxId.Get())
{
throw new IOException("We've already seen " + txId + ". A new stream cannot be created with it"
);
}
try
{
string existingInprogressNode = ci.Read();
if (null != existingInprogressNode && zkc.Exists(existingInprogressNode, false) !=
null)
{
throw new IOException("Inprogress node already exists");
}
if (currentLedger != null)
{
// bookkeeper errored on last stream, clean up ledger
currentLedger.Close();
}
currentLedger = bkc.CreateLedger(ensembleSize, quorumSize, ackQuorumSize, BookKeeper.DigestType
.Mac, Sharpen.Runtime.GetBytesForString(digestpw, Charsets.Utf8));
}
catch (BKException bke)
{
throw new IOException("Error creating ledger", bke);
}
catch (KeeperException ke)
{
throw new IOException("Error in zookeeper while creating ledger", ke);
}
catch (Exception ie)
{
Sharpen.Thread.CurrentThread().Interrupt();
throw new IOException("Interrupted creating ledger", ie);
}
try
{
string znodePath = InprogressZNode(txId);
EditLogLedgerMetadata l = new EditLogLedgerMetadata(znodePath, layoutVersion, currentLedger
.GetId(), txId);
/* Write the ledger metadata out to the inprogress ledger znode
* This can fail if for some reason our write lock has
* expired (@see WriteLock) and another process has managed to
* create the inprogress znode.
* In this case, throw an exception. We don't want to continue
* as this would lead to a split brain situation.
*/
l.Write(zkc, znodePath);
maxTxId.Store(txId);
ci.Update(znodePath);
return(new BookKeeperEditLogOutputStream(conf, currentLedger));
}
catch (KeeperException ke)
{
CleanupLedger(currentLedger);
throw new IOException("Error storing ledger metadata", ke);
}
}
