Go bingding hang at fdb.Transaction.set

Using FoundationDB
1

Our go client hang when writing data to foundationdb, the stack is:

fdb_set_hang
fdb_set_hang.jpg2020×476 275 KB

How could this happen? The status of fdb says ‘Healthy (Rebalancing)’
How to analyze this situation?
Thanks a lot.

2

You didn’t provide much details. Can you share the code?

Here is an example code for writing in

package main

import (
	"strconv"
	"time"

	"github.com/apex/log"
	"github.com/apple/foundationdb/bindings/go/src/fdb"
	"github.com/apple/foundationdb/bindings/go/src/fdb/directory"
	"github.com/apple/foundationdb/bindings/go/src/fdb/tuple"
)

func main() {
	// Different API versions may expose different runtime behaviors.

	fdb.MustAPIVersion(610)

	// Open the default database from the system cluster
	db, err := fdb.Open("./fdb.cluster", []byte("DB"))
	if err != nil {
		panic(err)
	}

	spiderDir, err := directory.CreateOrOpen(db, []string{"test"}, nil)

	if err != nil {
		panic(err)
	}

	facebookSub := spiderDir.Sub("sub")

	id := "2089982715568013122"

	_, err = db.Transact(func(tr fdb.Transaction) (ret interface{}, err error) {
		tr.Set(facebookSub.Pack(tuple.Tuple{"test", id}), []byte(strconv.FormatInt(time.Now().UnixNano(), 10)))

		return
	})

	if err != nil {
		log.Errorf("not good: %v", err)
	}

}
3

This also sounds a bit odd, as calling set() doesn’t involve any network communication (the key-value pair is just buffered locally), would would more strongly suggest some local issue.

4

Thanks, I will check the local code.