Many coredump generated thus filling up /var

Hi,

A huge number of coredump were generated in 1 of the T4-2.

I have found a similar issue described in document 1944735.1, however user is using 11.2.0.4 RAC Cluster.

User has deleted all the coredump.

Any idea why this is happening?

Is this due to a bug?

# ls -ltr

total 16115010

-rw-------   1 root     root     314982672 Oct 14 07:16 core_pdbstx01_oracle_200_1444832201_14561

-rw-------   1 root     root       12060 Feb 20 07:50 core_pdbstx01_oracle_200_1455983284_15085

-rw-------   1 root     root       27120 Feb 20 07:51 core_pdbstx01_orarootagent.bin_0_1455983268_1823

-rw-------   1 root     root       12228 Feb 20 07:51 core_pdbstx01_oracle_200_1455983293_5888

-rw-------   1 root     root        8408 Feb 20 07:51 core_pdbstx01_oracle_200_1455983363_22704

-rw-------   1 root     root          64 Feb 20 07:52 core_pdbstx01_oracle_200_1455983383_20310

-rw-------   1 root     root       12060 Feb 20 07:52 core_pdbstx01_oracle_200_1455983384_20362

-rw-------   1 root     root          64 Feb 20 07:53 core_pdbstx01_oracle_200_1455983393_17467