How do I avoid the “java.util.zip.ZipException: Not in GZIP format” error while using JMeter 2.12

Question

I'm trying to record my interactions with a SAAS website using JMeter 2.12. I get the following error trace as soon as I try to login:

java.util.zip.ZipException: Not in GZIP format at java.util.zip.GZIPInputStream.readHeader(Unknown Source) at java.util.zip.GZIPInputStream.(Unknown Source) at java.util.zip.GZIPInputStream.(Unknown Source) at org.apache.http.client.entity.GzipDecompressingEntity.decorate(GzipDecompressingEntity.java:56) at org.apache.http.client.entity.DecompressingEntity.getDecompressingStream(DecompressingEntity.java:68) at org.apache.http.client.entity.DecompressingEntity.getContent(DecompressingEntity.java:82) at org.apache.http.client.entity.GzipDecompressingEntity.getContent(GzipDecompressingEntity.java:41) at org.apache.http.conn.BasicManagedEntity.getContent(BasicManagedEntity.java:89) at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:348) at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74) at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1141) at org.apache.jmeter.protocol.http.proxy.Proxy.run(Proxy.java:236) Blockquote

I searched for the solution and found one in BugZilla: Bug 51918 where it says to turn off the concurrent download. I tried that by unchecking the "Retrieve All Embedded Resources" option in the 'HTTP Requests Defaults'- but still getting the error and cannot proceed.

Can anyone please help? Thanks a lot! --Ishti

Answer 1

Ok, I think I got an answer. Thanks to Bhargav in his post where he basically told to change the 'HTTP sampler settings' (in the HTTP test script recorder) to 'Java'. I tried that and it's not giving me the error anymore. I can proceed. Thanks!

Answer 2

I got into this problem in JMETER this week. The solution that worked for me in current version is.

In the header manager add:

Accept-Encoding: gzip;q=0,deflate,sdch

The server will send you a response that JMETER can handle.

Answer 3

I got this error on a Web application (Genexus WebApp) when it sent me an HTTP 403 error code with invalid encoding.

So to troubleshoot the problem I use two approaches:

1. First, turn on the log level to DEBUG, and enable the Log Viewer:

With this we can see the current payload in the Viewer:

2. Another alternative is to set the accept-encoding to identity, to receive the payload uncompressed.

So after that, I figured out the problem was my request (invalid params)