3256896 - Memory issue for Mail Sender Adapter related to java.lang.String.toLowerCase

There is a new error in the recent PO versions, with the following points to note:

- You are using mail channel.

- You observe a general slowness in the system, affecting various areas like monitoring, channels, adapters, etc..

- System is getting OOM dumps. Following is an example from a .hprof file:

""

The thread com.sap.engine.core.thread.execution.CentralExecutor$SingleThread @ 0x64998a0b8 HTTP Worker [@1472174398] keeps local variables with total size <> (x%) bytes.

The memory is accumulated in one instance of com.sap.engine.core.thread.execution.CentralExecutor$SingleThread, loaded by com.sap.engine.boot.loader.ResourceMultiParentClassLoader @ 0x6475a3a58, which occupies <> (x%) bytes.

The stacktrace of this Thread is available. See stacktrace. See stacktrace with involved local variables.

Keywords

• com.sap.engine.core.thread.execution.CentralExecutor$SingleThread
• com.sap.engine.boot.loader.ResourceMultiParentClassLoader @ 0x6475a3a58
• java.util.Arrays.copyOfRange([CII)[C
• Arrays.java:3664
• java.lang.String.<init>([CII)V
• String.java:207
• java.lang.String.toLowerCase(Ljava/util/Locale;)Ljava/lang/String;
• String.java:2693
• java.lang.String.toLowerCase()Ljava/lang/String;
• String.java:2716
• com.sap.aii.af.sdk.xi.net.MIMEInputSource.decodeParts(Lcom/sap/aii/af/sdk/xi/lang/Binary;Lcom/sap/aii/af/sdk/xi/mo/Message;)V
• MIMEInputSource.java:832

""

- Thread dumps are showing memory issues as well, in bold the important entries:

HTTP Worker [@1472174398] at java.lang.OutOfMemoryError.<init>()V (OutOfMemoryError.java:48) at java.util.Arrays.copyOfRange([CII)[C (Arrays.java:3664)
at java.lang.String.<init>([CII)V (String.java:207)
at java.lang.String.toLowerCase(Ljava/util/Locale;)Ljava/lang/String; (String.java:2693)
at java.lang.String.toLowerCase()Ljava/lang/String; (String.java:2716)
at com.sap.aii.af.sdk.xi.net.MIMEInputSource.decodeParts(Lcom/sap/aii/af/sdk/xi/lang/Binary;Lcom/sap/aii/af/sdk/xi/mo/Message;)V (MIMEInputSource.java:832)
at com.sap.aii.af.sdk.xi.net.MIMEInputSource.readBody(Lcom/sap/aii/af/sdk/xi/net/MIMEInputSource$MIMEReader;)V (MIMEInputSource.java:581)
at com.sap.aii.af.sdk.xi.net.MIMEInputSource.parse(Ljava/util/Map;Ljava/io/InputStream;)Lcom/sap/aii/af/sdk/xi/mo/MessageContext; (MIMEInputSource.java:220)
at com.sap.aii.adapter.xi.ms.XIMessage.createMessageContext(Ljava/util/Map;Ljava/io/InputStream;)Lcom/sap/aii/af/sdk/xi/mo/MessageContext; (XIMessage.java:1196)
at com.sap.aii.adapter.xi.ms.XIMessage.<init>(Lcom/sap/engine/interfaces/messaging/spi/MessageProperties;Lcom/sap/engine/interfaces/messaging/spi/transport/TransportBody;)V (XIMessage.java:482)...

- PO system is on version 7.5 at least with SP22 or above

MESSAGING SYSTEM SERVICE 7.50 SP 22 and above

XI ADAPTER FRAMEWORK 7.50 SP 22 and above