Dennis Felsing comments

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                                            Dennis Felsing

What needs to be done to have ghc-vis running on newest GHC?

I have tried switching to `gi-cairo` instead of svgcairo. Now I'm running into the next problem: ``` Failed to build hashtables-1.3.1. Build log ( /home/deen/.cabal/logs/ghc-9.0.2/hashtables-1.3.1-b18534b8e35d69179499dfbf94fca581c20ec0d1aec725813e429075202373a7.log ): Configuring library for hashtables-1.3.1.....

What needs to be done to have ghc-vis running on newest GHC?

``` Failed to build haskell-gi-0.26.2. The failure occurred during the configure step. Build log ( /home/deen/.cabal/logs/ghc-9.0.2/haskell-gi-0.26.2-536188c901579b27a3ccfb812769db11726ed1d9d0076d1cae7e9cdf0e0f1a1f.log ): [1 of 1] Compiling Main ( /home/deen/git/ghc-vis/dist-newstyle/tmp/src-1938273/haskell-gi-0.26.2/dist/setup/setup.hs, /home/deen/git/ghc-vis/dist-newstyle/tmp/src-1938273/haskell-gi-0.26.2/dist/setup/Main.o ) Linking /home/deen/git/ghc-vis/dist-newstyle/tmp/src-1938273/haskell-gi-0.26.2/dist/setup/setup ... Configuring...

[DocDB][LST] B&R: Error running import_snapshot: Invalid argument (yb/master/catalog_manager_ent.cc:2084): Unable to import snapshot meta file /tmp/.../SnapshotInfoPB: YSQL table not found: t0: OBJECT_NOT_FOUND (master error 3)

There might be a connection to https://github.com/yugabyte/yugabyte-db/issues/10716 which happened immediately after this bug. On the third attempt other commands like `create type` are just timing out, so something clearly broke...

[DocDB][LST] B&R: Error running import_snapshot: Invalid argument (yb/master/catalog_manager_ent.cc:2084): Unable to import snapshot meta file /tmp/.../SnapshotInfoPB: YSQL table not found: t0: OBJECT_NOT_FOUND (master error 3)

As discussed on call I will try with dropping database after each run to ensure we don't run into OoM

[DocDB][LST] B&R: Error running import_snapshot: Invalid argument (yb/master/catalog_manager_ent.cc:2084): Unable to import snapshot meta file /tmp/.../SnapshotInfoPB: YSQL table not found: t0: OBJECT_NOT_FOUND (master error 3)

Similar failure now with only one database (12 tables currently) after 3 hours: ``` Reproduce with: git checkout da0be044-dirty && ./long_system_test.py --scenario=backup_restore --portal=portal-iam.dev.yugabyte.com --universe_uuid=76e945a0-0084-4d71-be95-5e0896cdfccd --threads=10 --runtime=5 --complexity=full --drop --seed=216376 ```...

[DocDB][LST] B&R: Error running import_snapshot: Invalid argument (yb/master/catalog_manager_ent.cc:2084): Unable to import snapshot meta file /tmp/.../SnapshotInfoPB: YSQL table not found: t0: OBJECT_NOT_FOUND (master error 3)

Happened again on the same universe, so this is blocking further B&R testing with LST.

[backup] Restore lost some amount of values

Is it possible some of the last values are not flushed yet and thus don't get backed up properly? Flushing them manually to check if that fixes it could work...

[DocDB] Failure seen on 2.1.10.0 trying to get to 300 GB SST size per node with Cassandra workloads

Seen on 2.12.9.1-b1 as well with a hard inserting workload: ``` [centos@hostname ~]$ sudo cat /home/yugabyte/tserver/logs/yb-tserver.FATAL.details.2022-08-11T17_58_29.pid7951.txt F20220811 17:58:29 ../../src/yb/tablet/mvcc.cc:392] T 29dc41ef1bbf459596b10f9505814bbc P bcfadf5152d547afa34bf5efce83971f: T 29dc41ef1bbf459596b10f9505814bbc P bcfadf5152d547afa34bf5efce83971f: Recent 32 MVCC...

[DocDB] Failure seen on 2.1.10.0 trying to get to 300 GB SST size per node with Cassandra workloads

Doesn't happen with `enable_lease_revocation=false` gflag.

[DocDB] Failure seen on 2.1.10.0 trying to get to 300 GB SST size per node with Cassandra workloads

It required very high load and a few hours of running, I'm not sure how well it reproduces. Should I try on 2.8?