blocks|key|2195661|text|前几天我也遇到了同样的问题。我删除了tess4j并使用Tika+1.27+%2B+tesseract解决了这个问题。我使用Executor服务一次运行3个线程，这使内存保持在有限的范围内。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2195662|++++byte+fileBytes[]+;+//+image+bytes
++++Future<String>+future+=+executorService.submit(()+->+{
++++TesseractOCRConfig+config+=+new+TesseractOCRConfig();
++++config.setLanguage("kor%2Beng");
++++config.setEnableImageProcessing(1);
++++config.setPreserveInterwordSpacing(true);
++++ParseContext+context+=+new+ParseContext();
++++context.set(TesseractOCRConfig.class,+config);

++++Parser+parser+=+new+AutoDetectParser();
++++BodyContentHandler+handler+=+new+BodyContentHandler();
++++Metadata+metadata+=+new+Metadata();
++++parser.parse(new+ByteArrayInputStream(fileBytes),+handler,+metadata,+context);
++++return+handler.toString();
});

fileBody+=+future.get(120,+TimeUnit.SECONDS);|code-block|syntax|javascript|2195663|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I had same issue since last few days. I resolved by removing tess4j and using Tika 1.27 + tesseract.
I used Executor service to run 3 threads at a time this kept memory within limits.
<pre><code> byte fileBytes[] ; // image bytes
 Future&lt;String&gt; future = executorService.submit(() -&gt; {
 TesseractOCRConfig config = new TesseractOCRConfig();
 config.setLanguage(&quot;kor+eng&quot;);
 config.setEnableImageProcessing(1);
 config.setPreserveInterwordSpacing(true);
 ParseContext context = new ParseContext();
 context.set(TesseractOCRConfig.class, config);

 Parser parser = new AutoDetectParser();
 BodyContentHandler handler = new BodyContentHandler();
 Metadata metadata = new Metadata();
 parser.parse(new ByteArrayInputStream(fileBytes), handler, metadata, context);
 return handler.toString();
});

fileBody = future.get(120, TimeUnit.SECONDS);
</code></pre>
While the code given above works, later i made it simpler by just spawning a process to call tesseract directly.
<pre><code>protected String doOcr(byte[] fileBytes, int timeout, String language) {
 String text = null;
 File inputFile = null;
 File outputFile = null;
 try {
 inputFile = File.createTempFile(&quot;tesseract-input&quot;, &quot;.png&quot;);
 String outputPath = inputFile.getAbsolutePath() + &quot;-output&quot;;
 outputFile = new File(outputPath + &quot;.txt&quot;);
 try (FileOutputStream fos = new FileOutputStream(inputFile)) {
 fos.write(fileBytes);
 }

 String commandCreate[] = { &quot;tesseract&quot;, inputFile.getAbsolutePath(), outputPath, &quot;-l&quot;, language, &quot;--psm&quot;, &quot;1&quot; ,&quot;-c&quot;, &quot;preserve_interword_spaces=1&quot;};

 runCommand(commandCreate, timeout);
 if (outputFile.exists()) {
 try (FileInputStream fis = new FileInputStream(outputFile)) {
 text = IOUtils.toString(fis, Constants.UTF_8);
 }
 }
 } catch (InterruptedException e) {
 logger.warn(&quot;timeout trying to read image file body&quot;); 
 } catch (Exception e) {
 logger.error(String.format(&quot;Cannot read image file body, error : %s&quot;, e.getMessage()), e); 
 } finally {
 if (null != inputFile &amp;&amp; inputFile.exists()) {
 inputFile.delete();
 }
 if (null != outputFile &amp;&amp; outputFile.exists()) {
 outputFile.delete();
 }
 } 
 return text;
 }

protected void runCommand(String command[], int timeout) throws IOException, InterruptedException {
 logger.info(&quot;command : &quot; + StringUtils.join(command, &quot; &quot;));
 ProcessBuilder builder = new ProcessBuilder(command);
 builder.inheritIO();
 builder.environment().put(&quot;OMP_THREAD_LIMIT&quot;, &quot;1&quot;); /* default tesseract uses 4 threads per image. set to 1 */
 Process p = builder.start();
 boolean finished = p.waitFor(timeout, TimeUnit.SECONDS);
 if (!finished) {
 logger.warn(&quot;task not finished&quot;);
 }
 p.destroyForcibly();
 }
</code></pre>

We are trying to use Tesseract with Tess4j for OCR text extraction.

On continuous use of tesseract over a period, we notice the RAM used by the application getting increased gradually, During this time, The heap memory is still free. We monitored the off-heap memory using the jconsole. Off-heap memory also seems normal. But the RAM RSS memory is keeps increasing for the application

The problem I'm guessing is memory leak by tesseract during memory allocation of OCR, I'm not sure. Any ideas to approach further, please share 

<a href="https://i.stack.imgur.com/HzeRD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HzeRD.png" alt="enter image description here"></a>

<a href="https://i.stack.imgur.com/j3goH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/j3goH.png" alt="enter image description here"></a>

<a href="https://i.stack.imgur.com/ySZAM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ySZAM.png" alt="enter image description here"></a>

Tesseract / Tess4j memory leak

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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社区新版编辑器体验调研

我们正在尝试使用Tesseract和Tess4j进行文字提取。在连续使用tesseract一段时间后，我们注意到应用程序使用的RAM逐渐增加，在此期间，堆内存仍然是空闲的。我们使用jconsole监控堆外内存。堆外内存似乎也很正常。但应用程序的RAM RSS内存却在不断增加我猜问题是在OCR的内存分配过程中由tesseract造成的内存泄漏，我不确定。任何进一步的想法，请与我们分享​​​​​​

问Tesseract / Tess4j内存泄漏
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