After further analyzing the data. I see some pattern. The rows which were updated in last 2-3 weeks, the column which were not part of this update have the null values.
Has anyone encountered this issue during the upgrade? Thank you, On Thursday, 10 May 2018, 19:49:50 GMT-7, kooljava2 <koolja...@yahoo.com.INVALID> wrote: Hello Jeff, 2.1.19 to 3.0.15. Thank you. On Thursday, 10 May 2018, 17:43:58 GMT-7, Jeff Jirsa <jji...@gmail.com> wrote: Which minor version of 3.0 -- Jeff Jirsa On May 11, 2018, at 2:54 AM, kooljava2 <koolja...@yahoo.com.INVALID> wrote: Hello, Upgraded Cassandra 2.1 to 3.0. We see certain data in few columns being set to "null". These null columns were created during the row creation time. After looking at the data see a pattern where update was done on these rows. Rows which were updated has data but rows which were not part of the update are set to null. created_on | created_by | id ---------------------------------+---------------------+----------------------------------------- null | null | 12345 sstabledump:- WARN 20:47:38,741 Small cdc volume detected at /var/lib/cassandra/cdc_raw; setting cdc_total_space_in_mb to 1278. You can override this in cassandra.yaml [ { "partition" : { "key" : [ "12345" ], "position" : 5155159 }, "rows" : [ { "type" : "row", "position" : 5168738, "deletion_info" : { "marked_deleted" : "2018-03-28T20:38:08.059999Z", "local_delete_time" : "2018-03-28T20:38:08Z" }, "cells" : [ { "name" : "doc_type", "value" : false, "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "industry", "deletion_info" : { "local_delete_time" : "2018-03-28T20:38:08Z" }, "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "last_modified_by", "value" : "12345", "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "last_modified_date", "value" : "2018-03-28 20:38:08.059Z", "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "locale", "deletion_info" : { "local_delete_time" : "2018-03-28T20:38:08Z" }, "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "postal_code", "deletion_info" : { "local_delete_time" : "2018-03-28T20:38:08Z" }, "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "ticket", "deletion_info" : { "marked_deleted" : "2018-03-28T20:38:08.059999Z", "local_delete_time" : "2018-03-28T20:38:08Z" } }, { "name" : "ticket", "path" : [ "TEMP_DATA" ], "value" : "{\"name\":\"TEMP_DATA\",\"ticket\":\"a42638dae8350e889f2603be1427ac6f5dec5e486d4db164a76bf80820cdf68d635cff5e7d555e6d4eabb9b5b82597b68bec0fcd735fcca\",\"lastRenewedDate\":\"2018-03-28T20:38:08Z\"}", "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "ticket", "path" : [ "TEMP_TEMP2" ], "value" : "{\"name\":\"TEMP_TEMP2\",\"ticket\":\"a4263b7350d1f2683\",\"lastRenewedDate\":\"2018-03-28T20:38:07Z\"}", "tstamp" : "2018-03-28T20:38:08.060Z" }, { "name" : "ppstatus_pf", "deletion_info" : { "marked_deleted" : "2018-03-28T20:38:08.059999Z", "local_delete_time" : "2018-03-28T20:38:08Z" } }, { "name" : "ppstatus_pers", "deletion_info" : { "marked_deleted" : "2018-03-28T20:38:08.059999Z", "local_delete_time" : "2018-03-28T20:38:08Z" } } ] } ] } ]WARN 20:47:41,325 Small cdc volume detected at /var/lib/cassandra/cdc_raw; setting cdc_total_space_in_mb to 1278. You can override this in cassandra.yaml [ { "partition" : { "key" : [ "12345" ], "position" : 18743072 }, "rows" : [ { "type" : "row", "position" : 18751808, "liveness_info" : { "tstamp" : "2017-10-25T10:22:41.612Z" }, "cells" : [ { "name" : "created_by", "value" : "12345" }, { "name" : "created_on", "value" : "2017-10-25 10:22:41.637Z" }, { "name" : "doc_type", "value" : false, "tstamp" : "2017-10-25T10:22:42.487Z" }, { "name" : "last_modified_by", "value" : "12345", "tstamp" : "2017-10-25T10:22:42.487Z" }, { "name" : "last_modified_date", "value" : "2017-11-10 00:09:52.668Z", "tstamp" : "2017-11-10T00:09:52.668Z" }, { "name" : "per_type", "value" : "user" }, { "name" : "lists", "path" : [ "cn.cncn.bpnp" ], "value" : "[\"::accid:ab\",\"::accid:e1\",\"::accid:d2\",\"::accid:d3\",\"::accid:f3\",\"::accid:g3\",\"::accid:f4\",\"::accid:9c486ae5-00b2-3c63-af70-cff2950c4181\"]", "tstamp" : "2017-10-25T10:22:42.782Z" }, { "name" : "ticket", "path" : [ "TEMP_TEMP2" ], "value" : "{\"name\":\"TEMP_TEMP2\",\"ticket\":\"a4263820be49c3a222e0248532bcefc80c773194a804057561a97382e595b51f36bb46b8675589fc89dea4a5c0ceb944d63861b39d63c0067161e84c79328077c650df33530c7625857444711dc4b1051638123694ba6e9e29b1f906663f3\",\"lastRenewedDate\":\"2017-11-10T00:09:52Z\"}", "tstamp" : "2017-11-10T00:09:52.668Z" } ] } ] } ]