Re: PostgreSQL JDBC connection drops after inserting some records
Hi,
The exception is thrown by Postgres.
I'd start investigating there what the problem is.
Maybe you need to tweak your Postgres configuration, but it might also be
that the Flink connector needs to be differently configured.
If the necessary config option is missing, it would be good to add.
However, at this point it's not clear why Postgres fails.
I'd recommend to check the Postgres exception and figure out why it is
failing.
Cheers,
Fabian
Am Di., 28. Jan. 2020 um 09:02 Uhr schrieb Arvid Heise :
> Hi Soheil,
>
> what is your actual question? Did the application eventually finish or
> does it keep restarting?
>
> In general, communication with external systems may fail from time to
> time. Only if it persists, we would explore it. If it is very rare, a
> restart should already help.
>
> Best,
>
> Arvid
>
> On Thu, Jan 23, 2020 at 5:35 PM Soheil Pourbafrani
> wrote:
>
>> Hi,
>> I have a peace of Flink Streaming code that reads data from files and
>> inserts them into the PostgreSQL table. After inserting 6 to 11 million
>> records, I got the following errors:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> *Caused by: java.lang.RuntimeException: Execution of JDBC statement
>> failed. at
>> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.flush(JDBCOutputFormat.java:219)
>> at
>> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.writeRecord(JDBCOutputFormat.java:210)
>> at
>> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.writeRecord(JDBCOutputFormat.java:41)
>> at
>> org.apache.flink.streaming.api.functions.sink.OutputFormatSinkFunction.invoke(OutputFormatSinkFunction.java:86)
>> at
>> org.apache.flink.streaming.api.functions.sink.SinkFunction.invoke(SinkFunction.java:52)
>> at
>> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:56)
>> at
>> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:579)
>> ... 15 moreCaused by: java.sql.BatchUpdateException: Batch entry 0 INSERT
>> INTO csv_data(asset, tag, t, q, v, backfill, createdAt, createdBy) VALUES
>> ('SST', 'XC_XC', '2015-04-11 21:36:23+03', 12.0, '1.00', 'FALSE',
>> '2020-01-23 19:22:14.469+03', 'system') ON CONFLICT DO NOTHING was aborted:
>> An I/O error occurred while sending to the backend. Call getNextException
>> to see other errors in the batch. at
>> org.postgresql.jdbc.BatchResultHandler.handleError(BatchResultHandler.java:148)
>> at
>> org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:515)
>> at org.postgresql.jdbc.PgStatement.executeBatch(PgStatement.java:853) at
>> org.postgresql.jdbc.PgPreparedStatement.executeBatch(PgPreparedStatement.java:1546)
>> at
>> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.flush(JDBCOutputFormat.java:216)
>> ... 21 moreCaused by: org.postgresql.util.PSQLException: An I/O error
>> occurred while sending to the backend. at
>> org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:516)
>> ... 24 moreCaused by: java.io.EOFException at
>> org.postgresql.core.PGStream.receiveChar(PGStream.java:337) at
>> org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2000)*
>> at
>> org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:510)
>> ... 24 more
>>
>> However as I enabled the Restart Strategy, the app will automatically be
>> restarted and reconnect to the database.
>> My code simply reads data from files and after transforming them into the
>> table schema, insert the rows into the table.
>>
>> It would be great if anyone can help me with this
>> Thanks
>>
>
Re: PostgreSQL JDBC connection drops after inserting some records
Hi Soheil,
what is your actual question? Did the application eventually finish or does
it keep restarting?
In general, communication with external systems may fail from time to time.
Only if it persists, we would explore it. If it is very rare, a restart
should already help.
Best,
Arvid
On Thu, Jan 23, 2020 at 5:35 PM Soheil Pourbafrani
wrote:
> Hi,
> I have a peace of Flink Streaming code that reads data from files and
> inserts them into the PostgreSQL table. After inserting 6 to 11 million
> records, I got the following errors:
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> *Caused by: java.lang.RuntimeException: Execution of JDBC statement
> failed. at
> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.flush(JDBCOutputFormat.java:219)
> at
> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.writeRecord(JDBCOutputFormat.java:210)
> at
> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.writeRecord(JDBCOutputFormat.java:41)
> at
> org.apache.flink.streaming.api.functions.sink.OutputFormatSinkFunction.invoke(OutputFormatSinkFunction.java:86)
> at
> org.apache.flink.streaming.api.functions.sink.SinkFunction.invoke(SinkFunction.java:52)
> at
> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:56)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:579)
> ... 15 moreCaused by: java.sql.BatchUpdateException: Batch entry 0 INSERT
> INTO csv_data(asset, tag, t, q, v, backfill, createdAt, createdBy) VALUES
> ('SST', 'XC_XC', '2015-04-11 21:36:23+03', 12.0, '1.00', 'FALSE',
> '2020-01-23 19:22:14.469+03', 'system') ON CONFLICT DO NOTHING was aborted:
> An I/O error occurred while sending to the backend. Call getNextException
> to see other errors in the batch. at
> org.postgresql.jdbc.BatchResultHandler.handleError(BatchResultHandler.java:148)
> at
> org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:515)
> at org.postgresql.jdbc.PgStatement.executeBatch(PgStatement.java:853) at
> org.postgresql.jdbc.PgPreparedStatement.executeBatch(PgPreparedStatement.java:1546)
> at
> org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.flush(JDBCOutputFormat.java:216)
> ... 21 moreCaused by: org.postgresql.util.PSQLException: An I/O error
> occurred while sending to the backend. at
> org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:516)
> ... 24 moreCaused by: java.io.EOFException at
> org.postgresql.core.PGStream.receiveChar(PGStream.java:337) at
> org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2000)*
> at
> org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:510)
> ... 24 more
>
> However as I enabled the Restart Strategy, the app will automatically be
> restarted and reconnect to the database.
> My code simply reads data from files and after transforming them into the
> table schema, insert the rows into the table.
>
> It would be great if anyone can help me with this
> Thanks
>
PostgreSQL JDBC connection drops after inserting some records
Hi,
I have a peace of Flink Streaming code that reads data from files and
inserts them into the PostgreSQL table. After inserting 6 to 11 million
records, I got the following errors:
*Caused by: java.lang.RuntimeException: Execution of JDBC statement failed.
at
org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.flush(JDBCOutputFormat.java:219)
at
org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.writeRecord(JDBCOutputFormat.java:210)
at
org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.writeRecord(JDBCOutputFormat.java:41)
at
org.apache.flink.streaming.api.functions.sink.OutputFormatSinkFunction.invoke(OutputFormatSinkFunction.java:86)
at
org.apache.flink.streaming.api.functions.sink.SinkFunction.invoke(SinkFunction.java:52)
at
org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:56)
at
org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:579)
... 15 moreCaused by: java.sql.BatchUpdateException: Batch entry 0 INSERT
INTO csv_data(asset, tag, t, q, v, backfill, createdAt, createdBy) VALUES
('SST', 'XC_XC', '2015-04-11 21:36:23+03', 12.0, '1.00', 'FALSE',
'2020-01-23 19:22:14.469+03', 'system') ON CONFLICT DO NOTHING was aborted:
An I/O error occurred while sending to the backend. Call getNextException
to see other errors in the batch. at
org.postgresql.jdbc.BatchResultHandler.handleError(BatchResultHandler.java:148)
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:515)
at org.postgresql.jdbc.PgStatement.executeBatch(PgStatement.java:853) at
org.postgresql.jdbc.PgPreparedStatement.executeBatch(PgPreparedStatement.java:1546)
at
org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.flush(JDBCOutputFormat.java:216)
... 21 moreCaused by: org.postgresql.util.PSQLException: An I/O error
occurred while sending to the backend. at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:516)
... 24 moreCaused by: java.io.EOFException at
org.postgresql.core.PGStream.receiveChar(PGStream.java:337) at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2000)*
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:510)
... 24 more
However as I enabled the Restart Strategy, the app will automatically be
restarted and reconnect to the database.
My code simply reads data from files and after transforming them into the
table schema, insert the rows into the table.
It would be great if anyone can help me with this
Thanks
