Reported on nashorn-dev:

http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-August/005051.html

After enabling persistent code cache I'm getting the following error;

java.lang.NullPointerException
at jdk.nashorn.internal.runtime.Context.getContext(Context.java:1178)
at jdk.nashorn.internal.runtime.Context.getContextTrusted(Context.java:1166)
at jdk.nashorn.internal.runtime.Context.getContext(Context.java:338)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence.getLogger(OptimisticTypesPersistence.java:442)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence.access$700(OptimisticTypesPersistence.java:82)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence$4.run(OptimisticTypesPersistence.java:321)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence$4.run(OptimisticTypesPersistence.java:305)
at java.security.AccessController.doPrivileged(Native Method)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence.createCacheDirPrivileged(OptimisticTypesPersistence.java:305)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence.createCacheDir(OptimisticTypesPersistence.java:297)
at
jdk.nashorn.internal.codegen.OptimisticTypesPersistence.<clinit>(OptimisticTypesPersistence.java:100)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore.getVersionDir(CodeStore.java:269)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore.access$000(CodeStore.java:206)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore$1.run(CodeStore.java:245)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore$1.run(CodeStore.java:242)
at java.security.AccessController.doPrivileged(Native Method)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore.checkDirectory(CodeStore.java:242)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore.<init>(CodeStore.java:235)
at
jdk.nashorn.internal.runtime.CodeStore$DirectoryCodeStore.<init>(CodeStore.java:222)
at jdk.nashorn.internal.runtime.CodeStore.newCodeStore(CodeStore.java:106)
at jdk.nashorn.internal.runtime.Context.<init>(Context.java:531)
at jdk.nashorn.internal.runtime.Context.<init>(Context.java:467)
at
jdk.nashorn.api.scripting.NashornScriptEngine$1.run(NashornScriptEngine.java:129)
at
jdk.nashorn.api.scripting.NashornScriptEngine$1.run(NashornScriptEngine.java:125)
at java.security.AccessController.doPrivileged(Native Method)
at
jdk.nashorn.api.scripting.NashornScriptEngine.<init>(NashornScriptEngine.java:125)
at
jdk.nashorn.api.scripting.NashornScriptEngineFactory.newEngine(NashornScriptEngineFactory.java:232)
at
jdk.nashorn.api.scripting.NashornScriptEngineFactory.getScriptEngine(NashornScriptEngineFactory.java:195)

But nashorn runs normally.