invalid memory address or nil pointer dereference SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x14fb4be upsert{ query{ v as var(func: eq(id,12)) # this one has 1 000 000 followers } mutation { delete{ uid(v) <followers> * . } } } followers has count and reverse ind…

@ibrahim ideas? @BlankRain - wondering if you could share the dataset?

@BlankRain can you please show the stack trace? and the version on which you saw this panic.

Dgraph version : v20.07.0-12-g681fe9116 Dgraph codename : shuri-mod Go version : go1.14.1 @chewxy we use twitter data: wget http://an.kaist.ac.kr/\~haewoon/release/twitter_social_graph/twitter_rv.tar.gz # split by line split -l 54535107 twitter_rv.net then use the go code to convert c…

Hey @BlankRain , can you show me the complete stack trace of the crash? I’m trying to figure out what sequence of function calls led to this crash.

Hi , This is the stack trace . [image]

@BlankRain It looks like you’re running a modified version of dgraph Dgraph version : v20.07.0-12-g681fe9116 Dgraph codename : shuri-mod Go version : go1.14.1 Can you try running on a released version of dgraph? I don’t have the code you’re running and I cannot debug it :slight_smile: .

Hi The code based on the release of v20.07.0 . [image] Release Dgraph v20.07.0 (Savvy Shuri) · dgraph-io/dgraph Changed GraphQL Make updateGQLSchema always return the new schema. (#5540) Allow user to define and pass arguments to fields. (#5562) Move alias to end of graphql pipeline. …

Thanks @BlankRain . So the call to posting() is failing because uidPosting is nil on line 273. dgraph-io/dgraph/blob/7431be0dce0ffc42e3ff3e31b39fcdd5505e2bb3/posting/list.go#L260-L275 func (it *pIterator) posting() *pb.Posting { uid := it.uids[it.uidx] for it.pidx < it.plen { p := it.pl…

I can share my dataset. It may be too huge to copy. My dataset is based on the twitter data. I can show you how to produce the data. wget http://an.kaist.ac.kr/\~haewoon/release/twitter_social_graph/twitter_rv.tar.gz tar xvf twitter_rv.tar.gz split -l 54535107 twitter_rv.net mkdir test mv …

upsert{ query{ v as var(func: eq(id,12)) # this one has 1 000 000 followers } mutation { delete{ uid(v) <followers> * . } } } I do some delete in upsert block. the reason pb.Posting can be nil may around here.

Invalid memory address or nil pointer dereference error

Issues Dgraph

Topic		Replies	Views
Nil Pointer Errors When Running High Volume of Data Dgraph	2	745	June 5, 2018
Bugs in delete preds when the postinglist type is BitDeltaPosting (0x4) Dgraph status:accepted , kind:bug , ticket:created	10	830	January 19, 2021
Tokenizer panics (type error) Dgraph kind:bug	3	669	October 7, 2020
Key not Found Error Dgraph kind:bug	36	2191	October 26, 2021
Panic while migrating Dgraph	0	510	February 27, 2022

Invalid memory address or nil pointer dereference error

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