long remainingWaitMs = maxWaitMs;
long elapsed;
// Issue metadata requests until we have metadata for the topic or maxWaitTimeMs is exceeded.
// In case we already have cached metadata for the topic, but the requested partition is greater
// than expected, issue an update request only once. This is necessary in case the metadata
// is stale and the number of partitions for this topic has increased in the meantime.
do {
log.trace("Requesting metadata update for topic {}.", topic);
metadata.add(topic);
int version = metadata.requestUpdate();
sender.wakeup();
try {
metadata.awaitUpdate(version, remainingWaitMs);
} catch (TimeoutException ex) {
// Rethrow with original maxWaitMs to prevent logging exception with remainingWaitMs
throw new TimeoutException("Failed to update metadata after " + maxWaitMs + " ms.");
}
cluster = metadata.fetch();
elapsed = time.milliseconds() - begin;
if (elapsed >= maxWaitMs)
throw new TimeoutException("Failed to update metadata after " + maxWaitMs + " ms.");
if (cluster.unauthorizedTopics().contains(topic))
throw new TopicAuthorizationException(topic);
remainingWaitMs = maxWaitMs - elapsed;
partitionsCount = cluster.partitionCountForTopic(topic);
} while (partitionsCount == null);
waitOnMetadata(record.topic(), record.partition(), maxBlockTimeMs);
Default is “60 seconds”
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