}
}
private String createNonSequential(String path, byte[] data, List<ACL> acl,
CreateMode createMode) throws KeeperException, InterruptedException {
RetryCounter retryCounter = retryCounterFactory.create();
boolean isRetry = false; // False for first attempt, true for all retries.
while (true) {
try {
return zk.create(path, data, acl, createMode);
} catch (KeeperException e) {
switch (e.code()) {
case NODEEXISTS:
if (isRetry) {
// If the connection was lost, there is still a possibility that
// we have successfully created the node at our previous attempt,
// so we read the node and compare.
byte[] currentData = zk.getData(path, false, null);
if (currentData != null &&
Bytes.compareTo(currentData, data) == 0) {
// We successfully created a non-sequential node
return path;
}
LOG.error("Node " + path + " already exists with " +
Bytes.toStringBinary(currentData) + ", could not write " +
Bytes.toStringBinary(data));
throw e;
}
LOG.info("Node " + path + " already exists and this is not a " +
"retry");
throw e;
case CONNECTIONLOSS:
case SESSIONEXPIRED:
case OPERATIONTIMEOUT:
retryOrThrow(retryCounter, e, "create");
break;
default:
throw e;
}
}
retryCounter.sleepUntilNextRetry();
retryCounter.useRetry();
isRetry = true;
}
}