java.lang.OutOfMemoryError: Java heap space | SequenceReader.read about nutchpy HOT 4 CLOSED

I am getting the same error if I try to read the entire file at once. If being read in chunks (Say few rows of data), I can read the data. Any pointers on how to resolve the issue?

Error as seen in the log window (I have miniconda3 installed with Python 3.4)

py4j.protocol.Py4JJavaError: An error occurred while calling z:com.continuumio.seqreaderapp.SequenceReader.head.
: java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.lang.AbstractStringBuilder.(AbstractStringBuilder.java:68)
at java.lang.StringBuilder.(StringBuilder.java:89)
at org.apache.nutch.crawl.CrawlDatum.toString(CrawlDatum.java:408)
at com.continuumio.seqreaderapp.SequenceReader.head(SequenceReader.java:73)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379)
at py4j.Gateway.invoke(Gateway.java:259)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:207)
at java.lang.Thread.run(Thread.java:745)

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Hi @Pramodnagarajarao
As a work around may be you can create a script to read over segments (instead of one crawldb data file) iteratively.

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Thanks @karanjeets.
You mean to say that we need to read from segment directory's associated data file and not crawldb data file with sequence_reader.read() methods intact? If yes, I have tried that too. Didn't succeed.

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@karanjeets @Pramodnagarajarao

Theres is a better way, using stream/iterator reader: example

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