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  1. Debezium
  2. DBZ-2540

OutOfMemoryError Java heap space during snapshot of large bytea table

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Details

    • Bug
    • Resolution: Unresolved
    • Minor
    • Backlog
    • 1.2.1.Final
    • postgresql-connector
    • None
    • False
    • False
    • Undefined

    Description

      I can successfully reproduce the following issue at will.  Please let me know what I can do to provide further information.

      I have a particular postgres table which is only 9000 rows and 500MB in size, but it is a bit unique in that it has bytea data with the largest row being 6MB in size.  I have the Kafka topic configured to allow the max of 8MB and I also know for a fact that I have published near-8MB messages successfully, though of TEXT, not BYTEA, type.  Here is the schema of the table:

                                    Table "jfinzel.test_broken_dbz"
            Column             |           Type           | Collation | Nullable | Default
-------------------------------+--------------------------+-----------+----------+---------
 id                | integer                  |           | not null |
 created_on                    | timestamp with time zone |           |          |
 method_id            | smallint                 |           |          |
 failed             | boolean                  |           |          |
 failed_description | text                     |           |          |
 created_by                    | character varying(30)    |           |          |
 contents                 | bytea                    |           |          |
 name                     | character varying(32)    |           |          |
 created_date                     | date                     |           |          |
 last_changed_at               | timestamp with time zone |           |          |
Indexes:
    "test_broken_dbz_pkey" PRIMARY KEY, btree (id)
Publications:
    "dbz_publication"

       

      Even after tweaking JAVA_HEAP_OPTS, I am getting out of memory errors trying to run a snapshot of this table.  Here is the stack trace:

      Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,506 INFO   Postgres|foo_prod|postgres-connector-task  Snapshot - Final stage   [io.debezium.pipeline.source.AbstractSnapshotChangeEventSource]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,508 ERROR  Postgres|foo_prod|postgres-connector-task  Producer failure   [io.debezium.pipeline.ErrorHandler]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m java.lang.RuntimeException: org.postgresql.util.PSQLException: This connection has been closed.
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.relational.RelationalSnapshotChangeEventSource.rollbackTransaction(RelationalSnapshotChangeEventSource.java:435)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.relational.RelationalSnapshotChangeEventSource.doExecute(RelationalSnapshotChangeEventSource.java:152)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.pipeline.source.AbstractSnapshotChangeEventSource.execute(AbstractSnapshotChangeEventSource.java:63)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.pipeline.ChangeEventSourceCoordinator.lambda$start$0(ChangeEventSourceCoordinator.java:96)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.lang.Thread.run(Thread.java:834)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m Caused by: org.postgresql.util.PSQLException: This connection has been closed.
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at org.postgresql.jdbc.PgConnection.checkClosed(PgConnection.java:865)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at org.postgresql.jdbc.PgConnection.rollback(PgConnection.java:872)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.relational.RelationalSnapshotChangeEventSource.rollbackTransaction(RelationalSnapshotChangeEventSource.java:432)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011... 8 more
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,511 INFO   Postgres|foo_prod|postgres-connector-task  Connected metrics set to 'false'   [io.debezium.pipeline.metrics.StreamingChangeEventSourceMetrics]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,508 ERROR  ||  [Worker clientId=connect-1, groupId=debezium-postgres-staging] Uncaught exception in herder work thread, exiting:    [org.apache.kafka.connect.runtime.distributed.DistributedHerder]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,671 INFO   ||  Kafka Connect stopping   [org.apache.kafka.connect.runtime.Connect]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,673 INFO   ||  Stopping REST server   [org.apache.kafka.connect.runtime.rest.RestServer]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,679 INFO   ||  Stopped http_1.1.1.18083@7df76d99{HTTP/1.1,[http/1.1]}{1.1.1.1:8083}   [org.eclipse.jetty.server.AbstractConnector]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,679 INFO   ||  node0 Stopped scavenging   [org.eclipse.jetty.server.session]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,684 INFO   ||  REST server stopped   [org.apache.kafka.connect.runtime.rest.RestServer]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,684 INFO   ||  [Worker clientId=connect-1, groupId=debezium-postgres-staging] Herder stopping   [org.apache.kafka.connect.runtime.distributed.DistributedHerder]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,723 INFO   ||  WorkerSourceTask{id=foo_prod:debezium_postgres_snapshot-0} Committing offsets   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,723 INFO   ||  WorkerSourceTask{id=foo_prod:debezium_postgres_snapshot-0} flushing 0 outstanding messages for offset commit   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,723 ERROR  ||  WorkerSourceTask{id=foo_prod:debezium_postgres_snapshot-0} Task threw an uncaught and unrecoverable exception   [org.apache.kafka.connect.runtime.WorkerTask]
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m org.apache.kafka.connect.errors.ConnectException: An exception occurred in the change event producer. This connector will be stopped.
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.pipeline.ErrorHandler.setProducerThrowable(ErrorHandler.java:42)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.pipeline.ChangeEventSourceCoordinator.lambda$start$0(ChangeEventSourceCoordinator.java:117)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at java.base/java.lang.Thread.run(Thread.java:834)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m Caused by: java.lang.RuntimeException: org.postgresql.util.PSQLException: This connection has been closed.
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.relational.RelationalSnapshotChangeEventSource.rollbackTransaction(RelationalSnapshotChangeEventSource.java:435)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.relational.RelationalSnapshotChangeEventSource.doExecute(RelationalSnapshotChangeEventSource.java:152)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.pipeline.source.AbstractSnapshotChangeEventSource.execute(AbstractSnapshotChangeEventSource.java:63)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.pipeline.ChangeEventSourceCoordinator.lambda$start$0(ChangeEventSourceCoordinator.java:96)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011... 5 more
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m Caused by: org.postgresql.util.PSQLException: This connection has been closed.
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at org.postgresql.jdbc.PgConnection.checkClosed(PgConnection.java:865)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at org.postgresql.jdbc.PgConnection.rollback(PgConnection.java:872)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011at io.debezium.relational.RelationalSnapshotChangeEventSource.rollbackTransaction(RelationalSnapshotChangeEventSource.java:432)
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m #011... 8 more
Sep 15 10:15:42 dbz-stage-01 docker-compose[45685]: #033[33mconnect_2  |#033[0m 2020-09-15 15:15:42,723 ERROR  ||  WorkerSourceTask{id=foo_prod:debezium_postgres_snapshot-0} Task is being killed and will not recover until manually restarted   [org.apache.kafka.connect.runtime.WorkerTask]

      My Kafka Connect settings:

      version: '2'
services:
  connect:
    image: debezium/connect:1.2.1.Final
    ports:
     - "127.0.0.1:8083-8084:8083"
    volumes:
     - /etc/kafka/secrets:/etc/kafka/secrets
    environment:
     - BOOTSTRAP_SERVERS=pkc-my.region.aws.confluent.cloud:9092
     - GROUP_ID=debezium-postgres-staging
     - CONFIG_STORAGE_TOPIC=dbz_pg_connect_configs
     - OFFSET_STORAGE_TOPIC=dbz_pg_connect_offsets
     - STATUS_STORAGE_TOPIC=dbz_pg_connect_statuses
     - CONNECT_CONFIG_PROVIDERS=file
     - CONNECT_CONFIG_PROVIDERS_FILE_CLASS=org.apache.kafka.common.config.provider.FileConfigProvider
     - CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR=3
     - CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR=3
     - CONNECT_STATUS_STORAGE_REPLICATION_FACTOR=3
     - OFFSET_FLUSH_INTERVAL_MS=8000
     - OFFSET_FLUSH_TIMEOUT_MS=60000
     - CONNECT_PRODUCER_MAX_REQUEST_SIZE=8388608
     - CONNECT_HEARTBEAT_INTERVAL_MS=10000
     - CONNECT_SESSION_TIMEOUT_MS=30000
     - CONNECT_KAFKA_HEAP_OPTS=-Xms1g -Xmx3g
     - CONNECT_SECURITY_PROTOCOL=SASL_SSL
     - CONNECT_SASL_MECHANISM=PLAIN
     - CONNECT_SASL_JAAS_CONFIG=org.apache.kafka.common.security.plain.PlainLoginModule required username="foo" password="bar";
     - CONNECT_PRODUCER_SECURITY_PROTOCOL=SASL_SSL
     - CONNECT_PRODUCER_SASL_JAAS_CONFIG=org.apache.kafka.common.security.plain.PlainLoginModule required username="foo" password="bar";
     - CONNECT_PRODUCER_SASL_MECHANISM=PLAIN
     - CONNECT_CONSUMER_SECURITY_PROTOCOL=SASL_SSL
     - CONNECT_CONSUMER_SASL_JAAS_CONFIG=org.apache.kafka.common.security.plain.PlainLoginModule required username="foo" password="bar";
     - CONNECT_CONSUMER_SASL_MECHANISM=PLAIN

      My connector config:

      {
    "config": {
        "binary.handling.mode": "base64",
        "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
        "database.dbname": "foo_prod",
        "database.hostname": "foo.example.com",
        "database.password": "${file:/etc/kafka/secrets/connect.properties:PG_PASSWORD}",
        "database.port": "5432",
        "database.server.name": "foo_prod",
        "database.user": "${file:/etc/kafka/secrets/connect.properties:PG_USERNAME}",
        "datatype.propagate.source.type": ".+\\.numeric,.+\\.bytea",
        "decimal.handling.mode": "string",
        "include.unknown.datatypes": "true",
        "key.converter": "io.confluent.connect.avro.AvroConverter",
        "key.converter.basic.auth.credentials.source": "USER_INFO",
        "key.converter.basic.auth.user.info": "${file:/etc/kafka/secrets/connect.properties:SR_USERNAME}:${file:/etc/kafka/secrets/connect.properties:SR_PASSWORD}",
        "key.converter.schema.registry.url": "https://psrc-my.region.aws.confluent.cloud",
        "name": "foo_prod:debezium_postgres_snapshot",
        "plugin.name": "pgoutput",
        "publication.name": "dbz_publication_snapshot",
        "slot.name": "debezium_snapshot",
        "snapshot.mode": "always",
        "table.whitelist": "^jfinzel.test_broken_dbz$,^logical_ticker.tick$",
        "tasks.max": "1",
        "value.converter": "io.confluent.connect.avro.AvroConverter",
        "value.converter.basic.auth.credentials.source": "USER_INFO",
        "value.converter.basic.auth.user.info": "${file:/etc/kafka/secrets/connect.properties:SR_USERNAME}:${file:/etc/kafka/secrets/connect.properties:SR_PASSWORD}",
        "value.converter.schema.registry.url": "https://psrc-my.region.aws.confluent.cloud"
    },
    "name": "foo_prod:debezium_postgres_snapshot",
    "tasks": [
        {
            "connector": "foo_prod:debezium_postgres_snapshot",
            "task": 0
        }
    ],
    "type": "source"
}

      Here is part of a slightly different stack trace at other times:

       Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m Exception in thread "pool-4-thread-1" java.lang.OutOfMemoryError: Java heap space2020-09-15 10:53:17,283 ERROR  ||  [Worker clientId=connect-1, groupId=debezium-postgres-production] Heartbeat thread failed due to unexpected error   [org.apache.kafka.clients.consumer.internals.AbstractCoordinator]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,283 ERROR  ||  WorkerSourceTask{id=bar_prod:debezium_postgres-0} Failed to flush, timed out while waiting for producer to flush outstanding 259 messages   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,284 INFO   Postgres|foo_prod|postgres-connector-task  Connected metrics set to 'false'   [io.debezium.pipeline.metrics.StreamingChangeEventSourceMetrics]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,284 WARN   ||     [org.eclipse.jetty.util.thread.strategy.EatWhatYouKill]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m Exception in thread "pool-5-thread-1" java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m Exception in thread "KafkaBasedLog Work Thread - dbz_pg_connect_statuses" java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,283 INFO   ||  [Producer clientId=connector-producer-foo_prod:debezium_postgres_snapshot-0] Closing the Kafka producer with timeoutMillis = 30000 ms.   [org.apache.kafka.clients.producer.KafkaProducer]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,284 ERROR  ||  Unexpected exception in Thread[KafkaBasedLog Work Thread - dbz_pg_connect_offsets,5,main]   [org.apache.kafka.connect.util.KafkaBasedLog]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,288 ERROR  ||  WorkerSourceTask{id=bar_prod:debezium_postgres-0} Failed to commit offsets   [org.apache.kafka.connect.runtime.SourceTaskOffsetCommitter]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,288 INFO   ||  WorkerSourceTask{id=foo_prod:debezium_postgres_snapshot-0} Committing offsets   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,288 INFO   ||  WorkerSourceTask{id=foo_prod:debezium_postgres_snapshot-0} flushing 0 outstanding messages for offset commit   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,288 INFO   ||  WorkerSourceTask{id=baz_prod:debezium_postgres-0} Committing offsets   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,288 INFO   ||  WorkerSourceTask{id=baz_prod:debezium_postgres-0} flushing 0 outstanding messages for offset commit   [org.apache.kafka.connect.runtime.WorkerSourceTask]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,284 WARN   ||     [org.eclipse.jetty.util.thread.QueuedThreadPool]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m Exception in thread "DistributedHerder-connect-1-1" java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,284 ERROR  ||  Uncaught exception in thread 'kafka-producer-network-thread | producer-3':   [org.apache.kafka.common.utils.KafkaThread]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m 2020-09-15 10:53:17,287 ERROR  ||  Uncaught exception in thread 'kafka-producer-network-thread | connector-producer-bar_prod:debezium_postgres-0':   [org.apache.kafka.common.utils.KafkaThread]
Sep 15 05:53:17 dbz-pg01 docker-compose[50593]: #033[33mconnect_2  |#033[0m java.lang.OutOfMemoryError: Java heap space

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            jfinzel Jeremy Finzel
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