mihai-cazacu-adswizz commented on issue #7597: [materialized view] The generated specification is too big URL: https://github.com/apache/incubator-druid/issues/7597#issuecomment-514067508 I have this error again. One interval contains `3,130 segments` and the generated specification is huge. ``` /opt/druid/current/log/druid.log:2019-07-22T13:16:23,702 ERROR [MaterializedViewSupervisor-mv_some-ds] org.apache.druid.java.util.emitter.core.HttpPostEmitter - Event too large to emit (340,420,078 > 1,047,552): {"feed":"alerts","timestamp":"2019-07-22T13:16:22.627Z","service":"druid/overlord","host":"ec2-34-240-16-186.eu-west-1.compute.amazonaws.com:8090","version":"0.13.0-incubating","severity":"component-failure","description":"uncaught exception in MaterializedViewSupervisor-mv_some-ds.","data":{"class":"org.apache.druid.indexing.materializedview.MaterializedViewSupervisor","exceptionType":"java.lang.RuntimeException","exceptionMessage":"java.lang.RuntimeException: org.skife.jdbi.v2.exceptions.CallbackFailedException: org.skife.jdbi.v2.exceptions.UnableToExecuteStatementException: com.mysql.jdbc.PacketTooBigException: Packet for query is too large (29397252 > 16384000). You can change this value on the server by setting the max_allowed_packet' variable. [statement:\"INSERT INTO druid_tasks (id, created_date, datasource, payload, active, status_payload) VALUES (:id, :created_date, :datasource, :payload, :active, :status_payload)\", located:\"INSERT INTO druid_tasks (id, created_date, ... ``` I am going to increase the value of `maxZnodeBytes` to `32MB` but I don't think that is the best solution. Why don't you compress the spec or maybe, even better, store it in DB (instead of sending it to ZK)? Thank you!
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