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  1. ,
    via oracle.com by Unknown author

    An easy way to solve OutOfMemoryError in java is to increase the maximum heap size by using JVM options -Xmx512M, this will immediately solve your OutOfMemoryError.

  2. ,
    via Stack Overflow by Eugene Yokota

    In Eclipse : go to Run --> Run Configurations --> then select the project under maven build --> then select the tab "JRE" --> then enter -Xmx1024m.

    This should increase the memory heap for all the builds/projects. The above memory size is 1 GB.

java.lang.OutOfMemoryError: Java heap space	at java.util.Arrays.copyOf(Arrays.java:2367)	at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:130)	at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:114)	at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:415)	at java.lang.StringBuilder.append(StringBuilder.java:132)	at nl.inl.blacklab.externalstorage.ContentStoreDirUtf8.addToBlock(ContentStoreDirUtf8.java:474)	at nl.inl.blacklab.externalstorage.ContentStoreDirUtf8.storePart(ContentStoreDirUtf8.java:560)	at nl.inl.blacklab.index.DocIndexerAbstract.storePartCapturedContent(DocIndexerAbstract.java:138)	at nl.inl.blacklab.index.DocIndexerAbstract.appendContent(DocIndexerAbstract.java:156)	at nl.inl.blacklab.index.DocIndexerAbstract.processContent(DocIndexerAbstract.java:180)	at nl.inl.blacklab.index.DocIndexerXmlHandlers.endElement(DocIndexerXmlHandlers.java:691)	at nl.inl.blacklab.index.DocIndexerXmlHandlers$SaxParseHandler.endElement(DocIndexerXmlHandlers.java:760)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:609)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1789)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2965)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:649)	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:333)	at nl.inl.blacklab.index.DocIndexerXmlHandlers.index(DocIndexerXmlHandlers.java:725)	at nl.inl.blacklab.index.Indexer.index(Indexer.java:348)	at nl.inl.blacklab.index.Indexer.indexInputStream(Indexer.java:510)	at nl.inl.blacklab.index.Indexer.indexInternal(Indexer.java:475)	at nl.inl.blacklab.index.Indexer.index(Indexer.java:388)	at nl.inl.blacklab.tools.IndexTool.main(IndexTool.java:266)