Couchbase Java SDK times out with BUCKET_NOT_AVAILABLE

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I am doing a lookup operation Couchbase Java SDK 3.0.9 which looks like this:

// Set up
bucket = cluster.bucket("my_bucket")
collection = bucket.defaultCollection()
// Look up operation
val specs = listOf(LookupInSpecStandard.get("hash"))
collection.lookupIn(id, specs)

The error I get is BUCKET_NOT_AVAILABLE. Here are is the full message:

com.couchbase.client.core.error.UnambiguousTimeoutException: SubdocGetRequest, Reason: TIMEOUT {"cancelled":true,"completed":true,"coreId":"0xdb7f8e4800000003","idempotent":true,"reason":"TIMEOUT","requestId":608806,"requestType":"SubdocGetRequest","retried":39,"retryReasons":["BUCKET_NOT_AVAILABLE"],"service":{"bucket":"export","collection":"_default","documentId":"export:main","opaque":"0xcfefb","scope":"_default","type":"kv"},"timeoutMs":15000,"timings":{"totalMicros":15008977}}

The strange part is that this code hasn't been touched for months and the lookup broke out of a sudden. The CB cluster is working fine. Its version is Enterprise Edition 6.5.1 build 6299.

Do you have any ideas what might have gone wrong?

couchbase-java-api couchbase
2 Answers

Note that in Couchbase Java SDK 3.x, the Cluster::bucket method returns instantly, and continues opening a bucket in the background. So the first operation you perform - a lookupIn here - needs to wait for that resource opening to complete before it can proceed. It looks like it took a little longer to access the Couchbase bucket than usual and you got a timeout.

I recommend using the Bucket::waitUntilReady method after opening a bucket, to block until the resource opening is complete:

bucket = cluster.bucket("my_bucket")
bucket.waitUntilReady(Duration.ofMinutes(1));
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