Monthly Archives: August 2014

How to Solve: “Too many connections”; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException:

Hi, in one of my projects I used GPars and its withPool() method to execute some async tasks. The prime purpose of a task is to fetch some data from external sources and save the resulting data to a database. … Continue reading

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Posted in Development | Tagged , , | 1 Comment

Create a WebCrawler with less than 100 Lines of Code

Hi, while you find excellent open source Web crawlers (e.g. crawler4j), I wanted to write a crawler with very little coding. Very often I use the famous Jsoup library. Jsoup has some nice features to find and extract data from … Continue reading

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Posted in Development, Groovy | Tagged | 2 Comments

How to solve: ** java.lang.instrument ASSERTION FAILED ***: “!errorOutstanding” with message transform method call failed at ../../../src/share/instrument/JPLISAgent.c line:

Hi, as I tested some memory intensive, recursive functions with GGTS 3.6 and Grails 2.4, execution was interrupted with the following error message: While this error message is not really helpful to find the root cause, I guess it has … Continue reading

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Debugging in GGTS fails with: Error – your app path – does not appear to be part of a Grails application.

Hi, recently I worked on a Grails 2.4.x project in GGTS 3.6. After some coding, refactoring and reconfiguration, debugging stopped working with the following error message: The weird thing was, that grails run-app still worked, while only debugging wasn’t possible anymore. … Continue reading

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