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A JS7 - Credential Store can be used in a number of places. If access to a Credential Store is slow then you probably are hit by a problem with your entropy pool settings. This problem preferably can occur with Unix  Unix operating systems. This problem is not related to JS7.

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The connection to a Credential Store requires random numbers to encrypt the connection. Java releases before 1. 12 use the /dev/random file for high quality of randomness. However, when the entropy pool is is falling below the number of 64 units then /dev/random will  will block while reading random numbers.

Java can be configured to read from the file /dev/randomurandom to get random numbers. The difference with to the /dev/urandomrandom file is , that /dev/urandom does not block if no random numbers are not immediately available.

Check Entropy Pool Issues (Unix)

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Java holds the security configuration for example with the ./jre/lib/security/java.security or ./conf/security/java.security files. Specific locations depend on the Java version in use. You can modify this file to point to /dev/urandom instead of /dev/random like this:

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Find further information from JS7 - FAQ - How to apply How To - Apply Java Options