java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "4"

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URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "4"
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URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "","
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URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "</"
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URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "</"
java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "4"
at java.net.URLDecoder.decode(Unknown Source)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sendPostData(HTTPHC4Impl.java:1331)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.handleMethod(HTTPHC4Impl.java:557)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:375)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1146)

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